The Toucan Trilogy (Three dystopian novels: Night of the Purple Moon, Colony East, and Generation M)

http://www.amazon.com/Toucan-Trilogy-...

After a lethal pathogen introduced by a comet attacks the hormones of puberty, nearly all of the world’s adults die. Abby helps her brother and baby sister survive the apocalyptic nightmare, but she is helpless against the biggest threat of all: the deadly time bomb of adolescence.

This bestselling dystopian series has over 500 5-star reviews.