This is an unusual book, an odd book and is partly very readable, while at the same time containing a huge number of spelling errors and which makes a number of largely or wholly unproven assertions about the fate of the enigmatic Crabb, who disappeared, famously, while trying to investigate the hull of a Soviet warship in 1956.
There was been a 1958 film made about Crabb (Laurence Harvey playing Crabb), covering his wartime years as a daring diver in Gibraltar. There have been also a nunber of books about him, including one I remember reading while at school (which book is cited in this work too). That book, from 1968, claimed that Crabb had been captured, "turned" (possibly before capture, if I remember aright what I read 40 years ago) and made into a Soviet naval officer. Personally, I find the claim impossible mainly because if the Soviet naval Spetsnaz forces found Crabb useful, he would have been used as a trainer of diving saboteurs, not (as the book claimed) serving in uniform on Soviet ships. There is also the point that Crabb was born 1909, so by the late 1950's he would be about 50, old for a diver, let alone a combat one. Then there is the Soviet suspicion about people, especially those with foreign origins or links. Also, by the late 1950's Soviet diving had moved on greatly from the zero-point it was in when Crabb was serving and fighting in and around Gibraltar (from 1941). Would they really have needed him?
This book does tend to follow in the footsteps of that 1968 book, i.e. that Crabb was still alive for years, indeed decades, after his disappearance and was in Soviet service. One cannot totally discount the theory, if only because it is odd that the British files on Crabb will not be released until 2057, but the evidence is slight.
This book brings up extraneous facts which do not seem relevant: Nazi gold buried in the mud of Swiss or Austrian lakes, the scandal of the Kincora Boys' Home in Northern Ireland and allegations that Mountbatten and others were involved; also in relation to the latter, allegations that Blunt, the spy, was involved with Kincora from the 1930's. There is little or no evidence provided as to these claims and no attempt to properly link them together or with the Crabb story as a whole. Indeed, a major problem with this book is the number of times quite startling or interesting claims are made without any corroborative evidence. There is no index though there is a bibliography of sorts.
As to errors of spelling, proofing etc, they are truly legion. A few which caught my eye:
# "Silitoe" for [Sir Percy] Sillitoe, one-time D-G of MI5;
# "Borovick" for Borovik;
# "Court Marshall" for court-martial;
# "Suverov" for [Viktor] Suvorov, the GRU defector and author;
# "Tedington" for Teddington and so on.
One or two translations from the Russian were not quite right, either.
I should like to have known something of the authors, a husband and wife. From one part of the text it appears that the husband was a commercial diver in the 1970's.
I did find the book quite a good read in quite a number of places, but this is not a work I would recommend.