Harry Potter and the Deathly Hallows Part 1, To Kill a Mockingbird, and The Chronicles of Narnia, the lion, the witch, and the wardrobe. Hope I helped.
Definitely the Harry Potter series and then Percy Jackson and Heroes of Olympus series, not sure what book takes the third place though. There's just too many to choose from. My list of favorite books goes on and on.
Thanks, all 3 books I've enjoyed reading too :)