Ashes, Ashes by Jo Treggiari
The main reason I chose this book is because the main characters meet for the first time in a tree. Yeah go ahead an rip me a new one for that, cause I'm ashamed of myself. Haha.
But this book is actually really good and I enjoyed reading it.
This book takes places after the end of the world. 99% of the population is dead because of a deadly plague, drought, and floods. 16 year old Lucy has survived well enough on her own in Central Park forging for food and collecting water from the ponds. When Aiden rescues her from a pack of wild dogs, she joins his clan of survivors. Until a new enemy surfaces. Sweepers who's main job is to find plague victims take an interest in Lucy, because there is something special about her.
I think Lucy is a very strong female character, and I liked that world that Jo Treggiari came up with. So go read this fantastic book!