Listmania!
Books to feed your inner geek
Thud! (Discworld)Thud! (Discworld) by Terry Pratchett
Buy used from: £0.01
The ultimate geek author
The "Times" Killer Su DokuThe "Times" Killer Su Doku
Buy new: £3.49 / Used from: £0.01
Or any of the million other su doku books clogging the aisle of your local bookshop
Are You a Geek?Are You a Geek? by Tim Collins
Buy used from: £0.01
Obviously
Eats, Shoots & Leaves: The Zero Tolerance Approach to PunctuationEats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation by Lynne Truss
Buy used from: £1.67
Language pedants unite
Harry Potter and the Half-blood Prince (Harry Potter 6)Harry Potter and the Half-blood Prince (Harry Potter 6) by J.K. Rowling
Buy new: £11.89 / Used from: £2.37
An adult edition of a children's book must be geeky
Schott's Original MiscellanySchott's Original Miscellany by Ben Schott
Buy new: £4.00 / Used from: £0.01
...and the tide of useless information that followed
Serenity: The Official Visual CompanionSerenity: The Official Visual Companion by Joss Whedon
Buy new: £11.89 / Used from: £5.20
And just about any companion to anything
The Curious Incident of the Dog in the Night-timeThe Curious Incident of the Dog in the Night-time by Mark Haddon
Buy new: £4.67 / Used from: £0.01
Contains list of prime numbers
Doctor Who: Shooting Scripts (Doctor Who (BBC Hardcover))Doctor Who: Shooting Scripts (Doctor Who (BBC Hardcover))
Buy new: £12.34 / Used from: £5.50
Actually, he's called 'The Doctor' not 'Doctor Who'
The Klingon Dictionary: English/Klingon, Klingon/English (Star Trek)The Klingon Dictionary: English/Klingon, Klingon/English (Star Trek) by Marc Okrand
Buy new: £7.99 / Used from: £0.01
Okay, so I haven't really read this