My copy just arrived.
I think production standards may be even better than the Midland Secret Projects books.
280 pages, organisation seems to come closest to British Secret Projects 1935 to 1950 so chapters on USAAF single-engined fighters, twins, light and medium bombers, heavy bombers, attack aircraft, USN fighters, attack aircraft, and maritime patrol/flying boats, with appendices listing projects and requirements. The main organisational difference in comparison with BSP35-50 is stats in blocks inline with the text rather than en masse at chapter end. I think I prefer the new layout. The stats blocks are highlighted in blue, 3 views and other illustrations have a sepia background, it looks smart, though I have mixed feelings on the sepia. I notice a lot of period manufacturers illustrations in addition to the 3-views, which I find really helpful for visualising the look of the different aircraft.
It's not quite true to say there's a design new to me on every page, but it comes close!
Here's the projects listed on the front flap:
Bell Model 1, 3, 4, 11, 13, 16, 22
Fairchild Model 85 twin Ranger-engined fighter
Republic XP-72 production version
Hughes D-2/XP-37/XA-37 and D-5
Curtiss XP-71
Martin 207 Convoy Fighter
Burnelli XBA-1 and BX-AB-3
Douglas Model 9 Flying Wing Bomber
Boeing Model 316/Y1B-20/B-20, Model 322, 333, 333A, 384, 385 heavy bombers
Boeing Model 352, 374, 376, 386, 387, 394, 398, 400 Naval fighters
Curtiss "Cab over engine" Wasp Major fighter
Curtiss SB3C/A-40 (noted as most accurate 3v to date)
Kaiser Fleetwings Model 47 twin engined naval fighter
Martin 180, 181, 183 patrol flying boats
And just flicking through confirms that's only a fraction of the projects covered.