This is a big book - and there, I think, is it's downfall. Yes, it's quite comprehensive, but I found that the author is verbose to the point of being tedious. She writes much as one would expect a slightly stuffy show-hunter judge to speak, with a lot of wooliness about "the length of back being not too long or too short", "slope of shoulder being not too steep or too long"... yes, but what ARE the parameters? The book is illustrated with pencil sketches throughout rather than photographs, and I think much of her wordiness could easily be cured with some well placed comparative photographs, leaving the written text to explain WHY conformational aspects have such a role on function.
That said, if you can wade through the waffle, there is plenty of information in there, and some great nuggets hidden away, though for me the use of sketches was not a good inclusion and less illustrative than photographs.
Rob Oliver's "photographic guide to conformation" might be a useful alternative for more "visual" thinkers like me, if you're happy with descriptions and wordiness, this would be a good text.