Testing Computer Software, 2nd Edition by Cem Kaner, Jack Falk ,Hung Q. Nguyen

http://www.amazon.com/gp/product/0471358460/ref=cm_li_v_cd_d?tag=linkedin-20

Agile Testing: A Practical Guide for Testers and Agile Teams by Lisa Crispin, Janet Gregory

http://www.amazon.com/gp/product/0321534468/ref=cm_li_v_cd_d?tag=linkedin-20 

Influence: The Psychology of Persuasion (Collins Business Essentials)

Agile and Iterative Development: A Manager's Guide by Craig Larman

http://www.amazon.com/gp/product/0131111558/ref=cm_li_v_cd_d?tag=linkedin-20

Lessons Learned in Software Testing

An Introduction to General Systems Thinking (Silver Anniversary Edition) by Gerald M. Weinberg

http://www.amazon.com/gp/product/0932633498/ref=cm_li_v_cd_d?tag=linkedin-20

Implementing Lean Software Development: From Concept to Cash by Mary Poppendieck, Tom Poppendieck

http://www.amazon.com/gp/product/0321437381/ref=cm_li_v_cd_d?tag=linkedin-20

Lean Software Development: An Agile Toolkit by Mary Poppendieck,Tom Poppendieck

http://www.amazon.com/gp/product/0321150783/ref=cm_li_v_cd_d?tag=linkedin-20

A Concise Introduction to Logic by Patrick J. Hurley

http://www.amazon.com/gp/product/049580018X/ref=cm_li_v_cd_d?tag=linkedin-20

How to Win Friends & Influence People by Dale Carnegie

http://www.amazon.com/gp/product/0671027034/ref=cm_li_v_cd_d?tag=linkedin-20