Whilst interesting and suit-ably (pun most certainly intended) portable this book is nowhere near well illustrated or accessible enough to merit a strong recommendation. Depictions of menswear, where they are present are nicely laid out in ink wash with pen lines, but the loosehand style makes it difficult to distinguish what are often subtle variations in suit styles.
There is also an unfortunate gap between areas where the book states the glaringly obvious, and then others where nowhere near enough context is given, or more cripplingly jargon is left unexplained, with there being more than one instance where the glossary at the back does not cover the term, individual person or style that is referenced.
As Crompton himself recommends before all others, Dressing the man by Alan Flusser is a superior, though (non-problematically) American centred study of menswear that supersedes this one in every sense.
For all the criticisms there is interest to be found in this book in discussion of suit proportions and the different styles and respective merits of lapel, cut trouser e.t.c., however I can't imagine the kind of people that are likely to drop a few grand on a a bespoke suit would be likely to turn to this book, rather than the tailors themselves, magazines or word of mouth from their peers. I am thus left slightly confused as to who this book is aimed at, as I suspect the author is too.