Unread Books: A Tally

I have had a growing backlog of books to read for a number of years. Or so I thought. When I actually went around the bookshelves and listed them all, there weren't as many as I expected:

• Eleven Minutes Late: A Train Journey to the Soul of Britain - Matthew Engel
  
• Excel VBA: 24 Hour Trainer - Tom Urtis
  
• The Father Thing: Collected Short Stories - Philip K. Dick
  
• Getting Things Done - David Allen (I'm well aware of the irony...)
  
• How to Get a PhD - Philips and Pugh (No, probably not, but maybe a Masters...)
  
• I Still Have It: I Just Can't Remember Where I Put It - Rita Rudner
  
• Oracle Essentials: Oracle Database 11g by Rick Greenwald et al.
  
• Oracle PL/SQL Language Pocket Reference - Steven Feuerstein et al
  
• Programming Python - Mark Lutz
  
• Python: Visual Quickstart Guide - Toby Donaldson
  
• The Second World War - Sir Winston S. Churchill
  
• The Sign of Four - Sir Arthur Conan Doyle
  
• The Unusually Useful Web Book - June Cohen
  
• A Voyage Round John Mortimer - Valerie Grove
  
• The Valley of Fear - Sir Arthur Conan Doyle

Which is only 15 titles (although it should be noted that my edition of the Churchill book is actually six large volumes, which changes things a bit). Even so, compared to some people on my friends list, I'm clearly a slacker when it comes to volume of unread books.