Planet of the Zombie Vampires

From Author Wars - https://authorwars.com/publications/planet-of-the-zombie-vampires-447804.html

Overview:

Title: Planet of the Zombie Vampires
Author: Harry Harrison, Jack C. Haldeman, II
Year: 2012
ISBN-10: 9780575115569
Publisher: Gateway / Orion
Price: £2.99
Pages:
Binding: ebook
Type: Novel
Title Reference: Planet of the Zombie Vampires
Notes: Amazon Kindle's page count 320. Data from Amazon UK as of 2014-05-12. Price from W. H. Smith as of 2014-05-12. David Bischoff is credited as Harry Harrison's co-author on the cover, but, according to Amazon's Look Inside, Jack C. Haldeman, II is credited on the title page.