as a point of interest, the son of Michael Allen is a Pprune member. And the son of the pilot in that book is a very good chum of mine and has been for the last 30 years . . .
And it is quite a point.
Allen's book, along with C.F. Rawnsley and Bob Wright's "Night Fighter" about the evolution of night fighting in WWII - Rawnsley was the R/O to John Cunnigham - is one of the best of the many I've read on the subject and one I cited in my bibliography for a US night fighter squadron work.