Great Zombies in History is available for Pre-order at:

The McFarland website: http://www.mcfarlandpub.com/book-2.php?id=978-0-7864-7456-1 

Books a Million: http://www.booksamillion.com/p/Great-Zombies-History/Joe-Sergi/9780786474561?id=5682794001696

Barnes & Noble: http://www.barnesandnoble.com/w/great-zombies-in-history-joe-sergi/1113748405

And Amazon

Also available internationally at sellers including:

http://www.angusrobertson.com.au/book/great-zombies-in-history/38731934/