As already said, this does mostly focus in 'man tracking' but that doesnt matter! The techniques are universally applicable its just that the shape is different.
I have many tracking books and have attended several tracking courses and would say this book is written in the most useful way.
If you want to teach yourself trcking from a book rather than attending a course then this is probably the best one. It illustrates the signs to look for, what to do when you loose the track how to follow a trail etc.
There is plenty of information in this book that is just not in the others!
This book along with Ian Maxwells 'Animal signs ID' would certainly help you on your way!
And then if you really get into tracking 'Animal trakcs and signs, Bang and Dahlstrom' is a good book on animal signs (not really 'tracking') and Tom Brown Jr's 'Guide to Nature awareness and tracking'is also worth a read and will help 'complete the picture' so to speak.
If you are happy to have 4 books on tracking get all of these, If you are happy to have 2 get this and Max's and If you only want one book on tracking buy this one