There is an out of print book, Strangers in a Strange Land by Hans Henri Stapfer that is out of print, but can still be found used. There are some details that are a little sketchy about the actual aircraft loss (his versions differ from the official group associations and official records in some cases), but there are some good gems of info and some amazing photos in the book.
I did a presentation on "Captured Eagles" at the museum a number of years ago and still have the document somewhere. Here is one of the slides I prepared for it.