R.L. Stine 
Nightmare Room Thrillogy #1: Fear Games [EPUB ebook] 

Twelve ultra-smart kids have been selected to take part in a survival competition called Life Games, which is being held on a tropical island. But who, or what, is the enemy? A 3-part series within The Nightmare Room, the Thrillogy will reveal all…April can’t wait to go the Life Games competition. Only eleven other kids were chosen to take part in the tough physical challenges, and April knows she will survive and win the $100, 000 prize. What poor April doesn’t know is that an ancient evil will be playing in the games as well. And what April will really be competing for…is her life! Who Will Survive? Read all three books in The Nightmare Room Thrillogy to find out!