Broken Lands:

Broken Lands By: Jonathan Maberry
Fiction: YA, Sci-fi, 533 pages

This book is about a world where most people have died from a parasite that causes zombies.  It takes place years after the first night of the outbreak and most of the main characters are teens who were too young to really remember what the world was like before zombies.  There are 3 groups that the story is centered around.  The main group is in a town called New Alamo (near the former Mexican border) and is about 15 year old Gutsy Gomez and her 2 best friends right after her mother died and came back as a zombie.  The next group is Benny, also a teen, and his group of friends that live in Reclamation (in California.)  The last group is a lone man who lives in woods away from what little civilization is left.