Hi a hope this hasn't been mentioned before:
"The history of Dive Bombing" by Peter C. Smith. The idea that it covers, along with the history, are the reasons that the upper echelons of the RAF desired not to be too involved, at the time, in dive bombing because they saw themselves as upholders of strategic bombing ideology ( Trenchard and Douhet ) not Army cooperation. There is more about the history of dive bombing from the start in 1911 to 2007 and is very informative.
I found this book very good, it can be found here at the longest river also other quality book sellers. For those with a kindle £0.82 !