Principles of Generative Phonology is a basic, thorough introduction to phonological theory and practice. It aims to provide a firm foundation in the theory of distinctive features, phonological rules and rule ordering, which is essential to be able to appreciate recent developments and discussions in phonological theory.
Chapter 1 is a review of phonetics; chapter 2 discusses contrast and distribution, with emphasis on rules as the mechanism for describing distributions; chapter 3 introduces distinctive features, natural classes, and redundancy; chapter 4 builds on the concept of rules and shows how these can account for alternations; chapter 5 demonstrates the use of rule ordering; chapter 6 discusses abstractness and underlying representations; chapter 7 discusses post-SPE developments, serving as a prelude to more advanced texts.
Each chapter includes exercises to guide the student in the application of the principles introduced in that chapter and to encourage thinking about theoretical issues. The text has been classroom tested.

Mike Cahill, SIL International, on Linguist List Vol. 16-1258 (2005):
[...] an abundance of well laid-out exercises at the end of every chapter. [...] Jensen's discussions on how to analyze and good argumentation are excellent models to train students.