Alex Rider - Book series by Anthony Horowitz
"I love action-packed books and this series fits my preferences well. I recommend this series because the 14-year old main character is a better secret agent than an adult."
FunJungle - Book series by Stuart Gibbs
"I recommend this series for those who like the Spy School series. The books are about a kid that rescues the zoo from villains."
Guinness World Records - Nonfiction book series
"This series is full of interesting facts and records from around the world. I read these books over and over again, so I can compare the old records to the new ones."
Percy Jackson and the Olympians - Series by Rick Riordan
"I recommend this book series because it is a combination of Greek myths and action."
Spy School - Book series by Stuart Gibbs
"These books are very funny and action packed at the same time. I like the idea of there being a spy school for kids."
Star Wars Jedi Academy - Series by Jeffrey Brown
"Roan, the wimpy kid from Tatooine, has extremely funny adventures at Jedi Academy."
The Heroes of Olympus - Book series by Rick Riordan
"Percy Jackson returns with five new friends. My favorite one of his new friends is Frank because he's funny."
The Kane Chronicles - Book series by Rick Riordan
"This series combines humor, action, and Egyptian mythology. I recommend these books for fans of Rick Riordan."
The Zodiac Legacy - Book series by Stan Lee
"This is a funny new book series by the co-creator of many popular Marvel superheroes. The story is exciting and detailed. I look forward to the next book."A few more book series our son enjoys, but did not make his list of 9 favorites . . .
The Mysterious Benedict Society - Book series by Trenton Lee Stewart
The Horten's series by Lissa Evans
Series of Unfortunate Events - Book series by Lemony Snicket
Harry Potter - Book series by J.K. Rowling
Redwall - Book series by Brian Jacques and Gary Chalk
What are your tween's favorite book series? Share them with us in a comment here.