Well I have had the book a few days now and had a good read (also solved one of Djetset's puzzles using it!).
The book is very comprehensive and although their may be a few omissions it seems to be complete. The most amazing fact is the quantity of entries with the number produced as 1.
The only bad point is that it doesn't have an index, this can be especially annoying if you were looking for a Richard Oakes designed car. He was worked for so many manufacturers that is it difficult to work.
Apart from the index I would recommend it to anyone who has an interest in the British Kit Car industry. But on the other hand with an index you may well miss some of the real gems that probably shouldn't have ever seen light of day!