TOP #1
TOP #3
TOP #5
TOP #9
TOP #10

Refactoring: Improving the Design of Existing Code

Martin Fowler, Kent Beck, John Brant, William Opdyke, Don Roberts
TOP #11

Test-Driven Development in Microsoft® .NET (Developer Reference)

James W. Newkirk, Alexei Vorontsov, Alexei A. Vorontsov
TOP #13

The RSpec Book: Behaviour Driven Development with RSpec, Cucumber, and Friends (Facets of Ruby)

David Chelimsky, Dave Astels, Bryan Helmkamp, Dan North, Zach Dennis, Aslak Hellesoy
TOP #14
TOP #16
TOP #18

JUnit in Action, Second Edition

Petar Tahchiev, Felipe Leme, Vincent Massol, Gary Gregory