Discovery's List of 115 Best YA Books of All Time - hosted by booksiread_

'Percy Jackson and the Olympians' by Rick Riordan
Series of books.

 Rick Riordan’s trailblazing YA fantasy series kicks off with one of the best premises this side of the millennium: twelve-year-old Percy Jackson discovering he is the son of Poseidon. This revelation leads him to Camp Half-Blood, where Percy adjusts to his new identity and meets fellow demigod kids. Along with his friends Luke and Annabeth, Percy soon embarks on a perilous quest to recover Zeus’ master lightning bolt, the disappearance of which has thrown Olympus into chaos. And this is only the beginning of the gripping Percy Jackson pentalogy, which is chock full of nail-biting suspense and enthralling mythological adaptation. 
All books added
The Last Olympian by Rick Riordan

The Last Olympian

Percy Jackson and the Olympians #5

Rick Riordan

387 pages • digital • 2009

fiction fantasy middle grade adventurous emotional funny fast-paced
The Titan's Curse by Rick Riordan

The Titan's Curse

Percy Jackson and the Olympians #3

Rick Riordan

294 pages • paperback • 2007

fiction fantasy middle grade adventurous funny fast-paced
The Battle of the Labyrinth by Rick Riordan

The Battle of the Labyrinth

Percy Jackson and the Olympians #4

Rick Riordan

10 hours, 32 minutes • audio • 2008

fiction fantasy middle grade adventurous funny fast-paced
The Sea of Monsters by Rick Riordan

The Sea of Monsters

Percy Jackson and the Olympians #2

Rick Riordan

7 hours, 55 minutes • audio • 2006

fiction fantasy middle grade adventurous funny lighthearted fast-paced
The Lightning Thief by Rick Riordan

The Lightning Thief

Percy Jackson and the Olympians #1

Rick Riordan

377 pages • paperback • 2005

fiction fantasy middle grade adventurous funny lighthearted fast-paced