Deransart et al
Prolog: The Standard
Springer
Clocksin/Mellish
Programming in Prolog
Springer
Bartenstein, Geske, Hannebauer, Yoshie (eds)
Web Knowledge Management and Decision Support
Springer
Sterling/Shapiro
The Art of Prolog
MIT Press
Richard O'Keefe
The Craft of Prolog
MIT Press
Sterling (ed)
The Practice of Prolog
MIT Press
Ivan Bratko
Prolog Programming for Artificial Intelligence
Addison Wesley
Peter Flach
Simply Logical
Wiley
Not a book but a source in a class of its own:
http://www.pcai.com