http://en.wikipedia.org/wiki/Chess_endgame#Frequency_table The link to the Frequency table in Wikipedia reveals that it is amore plausible 1.7 percent of games that become Rook and Bishop plus pawns versus Rook and pawns , not the Arkell speciality with just the pieces.
To go back to the review and the book Amatuer to IM. some of the review is petty such as the nitpicking about Karlsbad which is certainly the standard name for such structures regardless of geography.
The main gripe though is that the book is not really revealing how Jonathan Hawkins went from fairly good club player to virtually grandmaster. We all know about needing to study more endings. But Hawkins improvement is not just down to ending study, e.g there is a video on You Tube where he out calculates Simon Williams. On the video the Ginger GM mentions his good opening preparation and calculation,there may be some specific reasons why he had such a relatively low rating till his Twenties.
for instance he went to a comprehensive school in North of England rather than an academic hothouse like St Paul's in London of King Edwards in Birmingham which produced many English GMs
I read that he also has a fear of travelling abroad which may have hampered his development.
I would have been more interested if the book dealt more with improvement in calculating skills like Tisdall's did and simply somepersonal history about his chess development and motivation.
there is inevitably in the pocket Fritz era perhaps some
suspicion about such a drastic increase in rating, though I see Hawkins has also won The British Rapidplay championship which would be evidence that his strength increase is genuine.