This is the top 10 of most mentioned books for Software Testers:

Lessons Learned in Software Testing – Cem Kaner, James Bach, Brett Petticord (31 votes)
Perfect Software and other Illusions about Software Testing – Gerald M. Weinberg (19 votes)
Agile Testing – Lisa Crispin and Janet Gregory (14 votes)
Thinking fast and slow – Daniel Kahneman (12 votes)
How to Break Software – James A. Whittaker (11 votes)
Tacit and Explicit Knowledge – Harry Collins (10 votes)
Explore It! – Elisabeth Hendrickson (9 votes)
Secrets of a Buccaneer-Scholar – James Bach (9 votes)
A Practitioner’s Guide to Software Test Design – Lee Copeland (9 votes)
An introduction to general systems thinking – Gerald M Weinberg (6 votes)
Peopleware: Productive Projects and Teams – Timothy Lister & Tom DeMarco (6 votes)
Quality Software Management Vol. 1 Systems Thinking – Gerald M. Weinberg (6 votes)
Secrets of Consulting – Gerald M. Weinberg (6 votes)
Testing Computer Software – Cem Kaner, Jack Falk, Hung Q. Nguyen (6 votes)
The Black Swan – Nassim Nicholas Taleb (6 votes)

 ebooks by our top tester - Ajay Balamurgadas:. 

http://enjoytesting.blogspot.in/2011/10/release-of-my-ebook-what-if.html

The Little Black Book of Test Design (PDF)
http://www.thetesteye.com/papers/TheLittleBlackBookOnTestDesign.pdf

Selenium Tutorial for Beginner/Tips for Experts
http://www.jroller.com/selenium/