The Hunger Games series by Suzanne Collins
The Uglies Series by Scott Westerfeld
The Last Apprentice series by Joseph Delaney
Maximum Ride series by James Patterson
The Rise of Renegade X by Chelsea M Campbell
The Unwanteds by Lisa McMann (Better for younger boys)
Swim The Fly by Don Calame (Better for older boys)
Divergent by Veronica Roth
Sabriel by Garth Nix
Birthmarked by Caragh M O'Brien
Arson by Estevan Vega
The Gardener by S.A. Bodeen
Life As We Knew It by Susan Beth Pfeffer
Unwind by Neal Shusterman
And though I haven't read The Percy Jackson Series by Rick Riordan, and Gone by Michael Grant, some friends have and they love them.
Those are my recommendations! Did I miss any?