Let me first state that the suggestion by Marco, that it would be more helpful to know what subjects the author discusses, and how he approaches his subject is indeed a good one.
It might also serve to make a review more attractive to readers.
Then some points concerning the attitude towards Model.
The simple fact that Model's decision to 'off himself' is seen as the coward's way out shows what little understanding there is/was about the attitude of the Prussian officer corps and how they thought how they should conduct themselves, what they deemed honourable and how their attitudes were towards others - within the army, people of different social classes - and how to respond to events around him, including the commission of war-crimes and genocide.
Indeed, as far as the issue of being anti-democratic and him being anti-semitic (better would be racist, since his racist attitudes were not limited to Jews alone(!)), in those respects Model was no different than the vast majority of the officers in the Wehrmacht, and in many respects not even the worst. In many ways it might be Model's 'problem' that he was probably more open about about his attitudes than most senior officers, and could not engage in apologetic polemics after the war was over since he committed suicide. Also, his personality was a rather difficult one, and did cause a lot of friction (and probably also resentment) amongst other Werhmacht officers (and could thus have made an attractive scapegoat).
As far as senior commanders organising and commanding defensive operations, Model was probably one of the best, if not the best commander the Germans had, and arguably the best of all the generals of all combattants in WW II in that respect. As such he deserves to be recognised and studied.
Of course any decent modern study should, if applicable (which would be the case in a biography) pay sufficient attention to his attitude towards the Nazi-regime.
In general, racism was wide-spread throughout most western militaries, indeed (western) society as whole - one only has to gloss at the attitude towards blacks within the American military or the attitude towards colonial soldiers serving in the various militaries as a well known example. Anti-democratic attitudes were also much wider spread throughout the world, also in the West!
Also, Marco,
I find it highly ironic that while highly critical of Model - and the 'veneration of German generals' in general - and to a considerable extent rightfully so, you have an image of von Manstein as your avatar. Von Manstein was little better, if any at all, than Model as far as his complicity in war-crimes, involvement in the Holocaust and crimes against humanity goes - indeed, most senior Wehrmacht (or German commanders in general - were. About the only difference is that von Manstein did not commit suicide.