Title: Night of the Purple Moon (The Toucan Trilogy Book 1)
Author: Scott Cramer
Price: FREE from today till 12/23
Rating: 4.4 out of 5.0(516)
Abby is looking forward to watching the moon turn purple, unaware that bacteria from a passing comet will soon kill off older teens and adults.

She must help her brother and baby sister survive in this new world, but all the while she has a ticking time bomb inside of her–adolescence.