I thought it best to include the full title of the copy of the book I own, which is indeed "Collins Guide to Animal Tracks and Signs", not the recent print of the book that you mention. As there is actually no apostrophe in the title, there seems to me to be no suggestion that the Collins publishing group are trying to steal Preben Bang and Preben Dahlstrom's glory, rather that they are indicating that this book is a part of the "Collins Guide" series.
Originally Posted by Fallow Way
Anyway, this is all getting a bit offtopic...
A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.