For kids of all ages
Make Magic! Do Good! by Dallas Clayton

For teens and adults
The Story of Us by Deb Caletti
The Girl in the Park by Mariah Fredericks
Skin Deep by Christopher Golden
Burning Bones by Christopher Golden and Rick Hautala
Last Breath by Christopher Golden and Rick Hautala
(Can you tell that I'm re-reading the fantastic Body of Evidence series?)

For stage and screen
Am I Bovvered? The Catherine Tate Show scripts
Proof by David Auburn