I've read Goshawk, Piece of Cake and Clean fight. The great thing about Mr. Robinsons books, love them or loath them, is he does draw the reader into the story. Yes there are inaccuracies, and some BoB pilots took exception to some of the characters, especially Cattermole, and the death of Squadron Leader "Rex"
For me, the uncomfortable comparison, is between the death of Rex and the death of Sqdn Ldr Pattle over Eleusis Harbour in 1941. This dogfight involved amongst others, Roald Dahl, and was the RAF's last great fight over Greece. I recommend "Air war over Yugoslavia Greece and Crete" by Chris Shores(Grub Street) to get a fuller picture, of tired aircrew pushed to the limit
Mr. Robinson, writes , warts and all, and just as some fighter pilots objected strongly, to the books characterisations, others agreed with some of the characters, and felt that only the tip of the iceberg was shown... who knows?
Tony