I first read this book back in 1995, having borrowed it from the local Library. I've recently been looking for a copy, and second-hand prices ranged from £22 ($33) in soft back, to £120 ($180) in hard back!
Picked this up, in hard back, excellent condition - for £1 !!!
An excellent book covering the actions of 609 Sqn RAF, and I/JG53, between August and December 1940, there are many previously un-published photos, from private collections, with those showing the Bf109Es of I/JG53, in particular, being of great interest, due mainly to the unusual colour schemes. These also shed new light on the reappearance of the famous 'Pik As' badge - as early as August!
Numerous first-hand accounts describe the battles between the two units on specific days, and the appendices include listings of claims and losses for both sides with aircraft codes/number and serial number/Werke Nummer where known.
All in all an great book and excellent reference.