Robert Speiden, "Foundations for Awareness, Signcutting and Tracking," 2009, some 230 pages. A SAR-oriented book with plenty of helpful specifics and photos applicable to animal tracking. The author's recapitulation of the Tom Brown, Jr. pressure release ideas seems tacked on rather than integrated with the rest of the book, but is exceptionally clear. This book reinforces the basics in a useful and direct manner, which makes it good for an occasional re-read.