https://en.wikipedia.org/wiki/Kent_Beck Books 1996. Kent Beck's Guide to Better Smalltalk : A Sorted Collection. Cambridge University Press. (ISBN 978-0521644372) 1997. Smalltalk Best Practice Patterns. Prentice Hall. (ISBN 978-0134769042) 2000. Extreme Programming Explained: Embrace Change. Addison-Wesley. Winner of the Jolt Productivity Award. (ISBN 978-0321278654) 2000. Planning Extreme Programming. With Martin Fowler. Addison-Wesley. (ISBN 978-0201710915) 2002. Test-Driven Development by Example. Addison-Wesley. Winner of the Jolt Productivity Award. (ISBN 978-0321146533) Beck's concept of test-driven development centers on two basic rules: Never write a single line of code unless you have a failing automated test. Eliminate duplication. The book illustrates the use of unit testing as part of the methodology including examples in Java and Python. One section includes using test-driven development to develop a unit testing framework. 2003. Contributing to Eclipse: Principles Patterns and Plugins. With Erich Gamma. Addison-Wesley. (ISBN 978-0321205759) 2004. JUnit Pocket Guide. O'Reilly. (ISBN 978-0596007430) 2004. Extreme Programming Explained: Embrace Change 2nd Edition. With Cynthia Andres. Addison-Wesley. Completely rewritten. (ISBN 978-0201616415) 2008. Implementation Patterns. Addison-Wesley. (ISBN 978-0321413093)