I would also recommend the work done by Richard Overy, a thoughtful historian of a variety of WW2 subjects. See his own short book "The Battle" and the symposium product which he edited :"The Burning Blue". The latter contains contributions from Bob Doe and Hans Ekkehard-Bob, as featured in the programme, and some interesting reflections on the Battle in popular culture, history and legend, including a piece on the BoB feature film as a semi-documentary and part of the historiography