The Dead series by Charlie Higson

Undead by Kirsty McKay

Ashes by Ilsa Bick

The passage by Justin Cronin

The walking dead tv tie-in by Robert Kirkman and Jay R. Bonansinga.

Dearly, Departed. / Habel, Lia. (2011)

Z/ Michael Thomas Ford. (2010)

World War Z : an oral history of the Zombie War/ Max Brooks. (2006)

Feed / Mira Grant 

The Forest of Hands and Teeth by Carrie Ryan 

Warm Bodies by Isaac Marion

John dies at the end by David Wong

Also maybe the movie Shaun of the Dead - zombies infect London...

Rot and Ruin by Jonathan Maberry. It has a sequel, Dust and decay.

A great collection of short stories just called Zombies, anthology of the undead, (Also published as The new dead: a zombie anthology) / Golden, Christopher 

Night of the Living Trekkies by Kevin David Anderson. 

This is not a test by Courtney Summers, 2012.

Pride and prejudice and zombies / Seth Grahame-Smith
Enclave / Ann Aguirre
Die for me / Amy Plum
Dawn of the Dead / George A Romero 
Zombies vs unicorns / Larbalestier, Justine; Black, Holly 2010
Boneshaker / Priest, Cherie 2009
The Dead / Gatward, David 2010
The Death collector / Richards, Justin 2007 
Gil's all fright diner / Martinez, A. Lee 2006
Handling the undead / Lindqvist, John Ajvide 2010
The Reapers are the angels / Bell, Alden 2010
The sunlight slayings / Emerson, Kevin 2009
Kiss of life / Daniel Waters
Zombie apocalypse / Stephen Jones

Boneshaker / Holly Black

Staggered Reads

http://tinyurl.com/c457ecb
or
http://reviews.libraryjournal.com/2012/04/books/genre-fiction/sf-fantasy/staggering-reads-dont-miss-fiction-from-the-zombie-apocalypse/


Best Post-Apocalyptic Novels
http://tinyurl.com/cssk6x3
or
http://www.squidoo.com/best-post-apocalyptic-novels