Even if you are familiar with Unit Testing, JUnit, and Test Driven Development your skills will be sharpened by the content in this book. The book jumps right into general principles of unit testing such as what to test, how much test code to write, and when to test. A concept named Right-BICEP is introduced to serve as a reminder for the types of unit tests you should be building in order to maximize test coverage. Another acronym named CORRECT is introduced to ensure boundary conditions are being thoroughly checked. Boundary conditions are notorious for runtime errors and must be carefully tested. This book definitely makes a good reference book to ensure your team is producing high quality tests.