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By D.F. Reese and the Wiley Kroom series
All pixies emerge from the blooms of the Birthing Garden…except, that is, Wiley Kroom. Despite the Elders’ struggle to civilize the wild boy from the Flywood and conceal his origins, nothing can subdue Wiley’s buoyant nature. And when Wiley catches the attention of Fayland’s chieftess, she metes out a terrible fate: banishment to the world of humans. Driven by an unwavering desire to return home, Wiley faces challenges from chasing a moondust collector to combating rock monsters…while finding friendship and discovering his own magical abilities. But he must tread carefully—nightmarish creatures lurk in the dark, seeking to rip him from existence. Will he find his way back to the world he loves and solve the mystery of his own creation…or will the magic of Fayland remain out of reach?
Many middle grade readers will try any book if it promises action and adventure! They enjoy the fast-moving plots, suspense, and thrilling escapades these stories contain. Today’s list includes a mix of high-action mysteries, outright adventure tales, and spy stories that provide the perfect combination of action and adventure.

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Books for Middle Grade Readers Who Like Action and Adventure
Here are 20 of my favorite middle grade adventure books:

City Spies
Published: March 10, 2020
Twelve-year-old Sara Martinez is a hacker bouncing from foster home to foster home in Brooklyn, New York. After getting arrested for hacking into the NYC foster care system to expose her foster parents as criminals, she meets a man named Mother, who gets her to join a team of kid spies operating out of a base in Scotland. As Sara adjusts, the team prepares for their first mission in Paris, France, even as Mother is working hard to find his two kids lost as a consequence of a previous mission. This is an excellent start to an exciting mystery series that both kids and adults can enjoy. Ages 9+

Inside the Park
Published: February 4, 2025
Timothy Strickland, aka Pumpsie, is the often-ignored, almost-last child of his family. He loves baseball, and while he isn’t naturally talented, he works hard to overcome his fears. When a storm leads to Pumpsie getting forgotten and locked alone inside the stadium with a dog and two suspicious men. Pumpsie uses his smart thinking to keep the men away and uncover their sinister plan while trying to stay safe until the morning. The best way to describe this book is Home Alone, but make it Alone in the Park. Peak wish fulfillment with lots of sports and cultural details. It absolutely flew by for me. Kids who enjoy sports and large families in their stories will love this one! Ages 8+
Charlie Thorne and the Last Equation
Published: September 17, 2019
Charlie Thorne is a genius tween recruited by the CIA to help stop a terrorist group from accessing a potentially destructive equation by Albert Einstein. Full of globetrotting, high suspense and spy hijinks, it’s fabulous on audio and great for mature 5th graders and middle schoolers. Ages 9+
Last Gate of the Emperor
Published: May 4, 2021
Yared Heywat lives in Addis Prime, a rundown reimagined Ethiopian city. Yared is a frequent competitor in an augmented reality game set in the city, sometimes ditching school — much to Uncle Moti’s chagrin. But just when he seems to be getting the upper hand, the game rules change and Yared has to sign in using his real name. Halfway through the game Yared is suddenly being pursued by real-life law enforcement simply for being Yared. Forced to join forces with his rival, a girl called the Ibis, Yared and his pet bionic lioness have to get to the bottom of the attack and in the process learn some shocking information about Yared’s identity. Last Gate of the Emperor is a propulsive sci-fi adventure set in an Afrofuturistic city, perfect for fans of The Black Panther‘s Wakanda. Ages 9+

The Wild Robot
Published: April 5, 2016
This charming illustrated book about a robot who ends up in the wild and survives by building community and caring for others is heartwarming but also surprisingly suspenseful and full of adventure. Soon to be a major motion picture, this would make a delightful readaloud for kids ages 7 and up.

Escape from Mr. Lemoncello’s Library
Published: June 25, 2013
Kyle Keeley is the class clown and a huge fan of all games—board games, word games, and particularly video games. His hero, Luigi Lemoncello, the most notorious and creative gamemaker in the world, just so happens to be the genius behind the construction of the new town library. Lucky Kyle wins a coveted spot as one of twelve kids invited for an overnight sleepover in the library, hosted by Mr. Lemoncello and riddled with lots and lots of games. But when morning comes, the doors stay locked. Kyle and the other kids must solve every clue and figure out every secret puzzle to find the hidden escape route! Ages 9+
Just Keep Walking
Published: March 5, 2024
Jo is still reeling from her parents’ divorce and her father’s decision to leave them for his girlfriend and her family. To prove that she and her mom can handle life without him, Jo and her mom embark on the 100-mile Lake Superior hike with their backpacks, dehydrated food, tents, and a book (for Jo). As the two weather hilly terrain, minor injuries, wild animals, new friendships, disappointments, and adverse weather, they find the inner strength to move on and to forgive Tim, Jo’s father. I really enjoyed this book. It made me want to pack up and go hiking or camping. Jo’s emotional struggles and humor bring a richness and levity that make this one an enjoyable pageturner. Ages 9+

Spy School
Published: March 6, 2012
Ben Ripley’s life does a 180 when he gets an invitation to work for the CIA, only to find out that it was a case of mistaken identity because someone on the inside has a secret ploy against the agency. With a new crush roping him into an undercover mission to unravel the plot, Ben discovers that he’s actually not half-bad at being a spy. This isn’t my favorite spy series, but kids love it and can’t stop reading. Perfect for fans of spy and adventure books grades 6+ since there’s gun use involved. Ages 10+

Book Scavenger
Published: April 12, 2016
For twelve-year-old Emily, the best thing about moving to San Francisco is that it’s the home city of her literary idol: Garrison Griswold, book publisher and creator of the online sensation Book Scavenger (a game where books are hidden in cities all over the country and clues to find them are revealed through puzzles). Upon her arrival, however, Emily learns that Griswold has been attacked and is now in a coma, and no one knows anything about the epic new game he had been poised to launch. Then Emily and her new friend James discover an odd book, which they come to believe is from Griswold himself, and might contain the only copy of his mysterious new game. Ages 9+
The Unforgettable Logan Foster
Published: January 18, 2022
The Unforgettable Logan Foster #1 is a fantasy middle grade debut by author Shawn Peters. Logan is a foster kid at a boys’ foster home. He’s on the autism spectrum, has a photographic memory, and isn’t the best at picking up on social cues. But just when Logan is sure that he’ll never be adopted, a new couple Margie and Gil show up. After a rocky start, Logan is settling in with his new foster parents when he starts noticing some weird things. Gil never seems to eat and are Margie’s tears silver? He’s only processing the fact that his new parents might be superheroes when they get kidnapped by a supervillain and it’s up to Logan to save them. This is a superb, fast-paced superhero fantasy about identity, self-worth, and finding community. Ages 9+
National Archive Hunters 1: Capitol Chase
Published: May 14, 2024
Twins Ike (Icarus) and Iris are gifted in different ways. Ike is a history nerd, while Iris is an athlete with a strong sense of direction (call her the human GPS). Their dad is ex-military and now runs a museum with their mom, who is an art curator. When Iris spots a girl stealing an artifact in their Americana museum, it begins a string of art heists by the same 10-year-old girl which gets the family roped into solving the crime to save their museum and clear their name. This is a fun romp of a story suffused with US history, especially the Revolutionary War period. Although it’s on the longer side, it is truly action-packed and told from the perspectives of both siblings. Ends in a gentle cliffhanger, and readers will be thrilled to know it’s going to be a series. Ages 9+
Mrs. Smith’s Spy School for Girls
Published: July 4, 2017
This book all about a girl who gets sent to a private boarding school, only to discover that it’s a cover for a girls spy school is surprisingly funny, action-packed, and full of heart. I recommend the audiobook which is beautifully done. Ages 10+
Stormbreaker (Alex Rider #1)
Published: May 21, 2001
This London-set thriller about a boy who’s roped into joining a group of spies after his uncle (and guardian’s) death is suspenseful and especially fun on audio. I’d hand this one to readers in the 6th grade or older! Ages 11+
The Nerviest Girl in the World
Published: August 18, 2020
Set in 1911, this short novel is all about a girl who gets to star in a motion picture in the early days of silent film, with her brothers when the movie director discovers that she’s good with horses. I found this to be surprisingly funny and insightful, especially in terms of the history of moviemaking. The audiobook is also very well done. Ages 9+
Clean Getaway
Published: January 7, 2020
William “Scoob” Lamar is hoping to make a clean getaway with his white G-ma. Especially because his dad is mad at him after an unpleasant school incident and subsequent suspension. At first he’s happy to be spending time with this G-ma, but soon, he realizes that this isn’t quite the trip he expected. As Scoob and G-ma travel through the US South, G-ma lets him into family history: his grandfather’s life, G-ma’s misdeeds and what life was like when Black people needed the Green Book to move through the US. This is a fast-paced, clever story full of twists and a sense of adventure. Ages 9+

Averil Offline
Published: February 13, 2024
Averil’s mom and several parents of kids in her school and neighborhood use an app called Ruby Slippers to track their kids’ location, request video and photos from them on demand, and generally monitor their behavior and actions all day and Averil and Max, another classmate, are sick of it. Especially when they find out that the app will be updated soon to let parents remotely turn on their kids’ cameras at will. Both kids make a plot to ditch a camping trip and spend the weekend hunting down the original app developer, Rider Wollybeck, in hopes of asking him to rescind the update. Averil Offline is a clever, outside-the-box mystery-adventure story about childhood autonomy and women in STEM (coding). Ages 9+
Across the Desert
Published: October 12, 2021
12-year-old Jolene has a tough life. Her mom is misusing opioids and can barely care for her. She’s mocked at school for wearing too-small clothing and looking haggard. Jolene’s only bright spot is a tween pilot she watches via livestream at the library, “Addie Earhart.” Addie and Jolene gradually form a warm friendship and encourage each other through life’s hardships. But one day during the livestream, Addie crashes her plane. No one but Jolene is watching the stream, and Addie’s mom doesn’t know she even flies planes. It’s up to Jolene to save her. This is a heart-pounding middle grade novel about self-worth, friendships, and the struggle of a parent with addiction. It features a strong-willed heroine willing to sacrifice her wellbeing to save a friend, even when other people don’t believe her. Ages 10+

The Other Side of Tomorrow
Published: November 12, 2024
In this gorgeous graphic novel, tweens Myunghee and Yunho’s paths intersect the day before they both escape the communist regime and converge again in China, where Yunho’s mother takes Myunghee in and along on their arduous, perilous escape plan.The Other Side of Tomorrow is a breathtaking, suspenseful, and gorgeously illustrated graphic novel about two kids escaping North Korea. Ages 9+

Dinner at the Brake Fast
Published: June 25, 2024
A heist, a creepy pumpkin maze, and a murderous hen take center stage in this funny, heartfelt adventure tale set in the PNW. Tacoma’s parents have finally allowed her to cook dinner for their breakfast-only truck-stop diner. But on the D-day, she wakes up to her dad in a bad depressive episode and sneaky trucker Kyle provoking her by reminding her he stole her dad’s picture with Bruce Springsteen and Tacoma’s had it. She decides she’ll go and steal back her dad’s picture. There is some info about bullying, bad friends, Tacoma’s anxiety, and her father’s struggle with his mental illness. I really enjoyed this one and blew through it in a couple of hours. Ages 8+
The Mystery of Locked Rooms
Published: April 2, 2024
When 7th grader Sarah is faced with the prospect of losing her home, she decides to team up with her two friends, who are also escape room fans, to crack the codes and break out of a 1950s fun house. Suspense, adventure, riddles, puzzles, thrills, and, surprisingly, a lot of heart make this story a winner for young readers. Although Sarah and her friends are older, this is a great story that will work for readers as young as the 4th or 5th grade. Kids who like books with puzzle solving or an escape room setting will love this one. Ages 9+
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Wow! What an amazing line up of great books! You sure do work hard. Thanks, very much.