I recommend
The Zombie Survival Guide: It's a guide on how to survive the living dead. It's a fun little book to read.
The Adventures of Alfred Kropp: It's a story about some kid who finds King Author's sword. It's really adventurous, and I found it really cool.
Books by Chris Ryan; Firefight, Ultimate Weapon, etc.. (Action adventure books. About modern warfare special forces stuff.)
Books by Clive Cussler; Dragon, The Chase, etc... (Mystery books, I found them pretty cool)
Books by Andy Griffiths; Just Stupid, Just Joking, Just Shocking, etc... (I found this to be very fun to read. They are for people of younger ages, so I'm not sure if you want to read this.)