This book has been sitting in the "to-be-read" pile for awhile now and it is a very nice survey of design concepts and x-planes that will satisfy all those with a taste for the truly esoteric; particularly if you're a fan of seaplanes. I do tend to agree with the folks who have reviewed this over at Amazon that it wouldn't have hurt if this work had been fortified with some work in government and service archives, but I certainly don't regret acquiring it.
Originally written: July 30, 2016.
P.S. I would note that since Specialty Press has gone out of business in 2023, that one should not pass up the chance to purchase a reasonably priced copy if you have the opportunity, as this is likely to become an expensive collector's item.