This is the version I currently own of Guy Sajer's account
I cannot comment on the authenticity and detail as I am not an expert on the Russian campaign and so will leave that to the experts but the story reads in a realistic and believable way and is full (perhaps too much so) of period 'feel'.
Within the account are numerous ideas for games and so I fully intend turning some of these into Portable Wargame or MOMBAT scenarios. In fact I plan to dedicate game number 21 to just that so we will be heading out to the Eastern Front for action involving the Red Army and the soldiers of the Gross Deutschland Division. A brief outline of the history of the division can be found here although several more detailed histories are available.