Recently, I bought the book "Lesson Learned in Software Testing" (One of the most important QA books I have read), and I found an interesting topic at almost the end of the book, "The Context-Driven Approach to Software Testing". It takes some information about the Seven Principles of the Context-Driven, and some illustrations and examples of them. Really it is quite interesting how authors of this book takes you another dimension of thoughts about QA Software Testing. if you have any time I advocate to read this book. This book has 293 lessons partitioned into 11 chapters.