Maybe the most known and recurrently used Taguchi techniques are the Orthogonal Arrays for DOE; but they're not the only ones that Taguchi developed in order to achieve a quality product design. The Loss Function, the S/N ratio and the Tolerance Design are part of the "Robust Engineering" that consolidated Taguchi as the quality guru he is.
Many general DOE concepts are so well explained in this book that it represents a great introductory text to this subject. Nevertheless this is a Taguchi techniques book, not a complete DOE text, so it's possible that you'd like to look for "Design and Analysis of Experiments" by Douglas C. Montgomery.
This book is highly valuable if you want to understand the Taguchi philosophy for developing quality products and a must have for DOE beginners.