This would be "Reach For the Sky" I'd reckon. These days I think it would be seen as a rather idealised uncritical look at Bader, who was not a man without faults for all his many sterling qualites of leadership & compassion toward those similarly afflicted. There are other more objective books about Bader though at present I can't think of the titles.
A search on Amazon or similar website will give a list of titles & reviews. The biography by Turner reviews quite well. Noted RAF author Dilip Sarkar has very recently published a biography as well though there are no reviews as yet for that. The Brickhill book has the bare bones of his life OK but is lacking objectivity in some opinions.
Steve.