[Andrei Demjanko]

I do not want to comment critically, but I think the golden times of claims vs losses literature are long over.

Judging by free sample, the book is a great effort, but the genre itself have its fundamental shortcomings. The main drawback is that while providing some statistics and despite the glimpses of aerial combats which could be seen flashing through the narrative this book omits its subject - the air war itself. So we can see a brief summary of claims and losses, but we have virtually no idea what aerial activity behind these combats was all about. What were the tasks of the opposing air forces? What RAF and Luftwaffe did to accomplish these tasks? There is no information on strategical and tactical objectives. There is no information about the daily total number of sorties for RAF and Luftwaffe flown, not to mention of breakdown of these totals into fighter-bomber-coastal-recce, is in the book. There is no information on the ground or shipping targets, tonnage of bombs dropped and damage to the ground infrastructure. We have been only informed that pilot X shot down aircraft Y. In order to show better what I want to emphasize, let's look at the sample:

1st July 1941
The day began with a loss for Fighter Command when Sergeant
F.A.Thornber, a 91 Squadron Spitfire pilot, failed to return from a dawn
weather reconnaissance. [Time of the mission? What area it was supposed to cover?]
In the morning, the first of 39 Blenheims were sent out on antishipping
and cloud cover bombing missions. [Time? Targets? Number of aircraft sent to bomb each target? What units had been participating?]
...six Stirlings had also been despatched as
cloud cover raiders. Three of 7 Squadron were sent to Aurich and Emden [The best part of the narrative for 1 July followed, but what was the time of take off and landing for the mission? What about the other three Stirlings?]

In the early evening Circus No.28 was despatched, but the mission
was aborted due to haze. [Number of bombers and fighters participating? Exact time? What was the intended target?] The Tangmere Wing continued on to carry out a fighter sweep and Sergeant Smith of 145 Squadron fired at a lone Bf109 without effect. [Time and location of the engagement?]

One inconclusive combat took place when a 143 Squadron
Beaufighter crew fought an He111 at 09.00 hours [Where exactly? What was the mission of He 111?]

The number of aircraft participating in aerial combats from each side is for the most part omitted. The list of losses includes subtypes for German aircraft but no information about variants of British aircraft

Etc. etc. etc.
Well, probably it would be sufficient in 1988, but it is 2018 now.