I did a little checking myself. The book is being sold directly on Beograd.com, on "Srpska-mreza"/Serb-net, on "Books on Serbia" and most curiously of all, it's warmly endorsed on "The Emperor's New Clothes.Net, or tenc.net. In that last link,
The Grand Mufti of Jerusalem, Izetbegovic's boyhood idol
it's quite clear that while the "mission" of the unit might have been to "restore order" it did "everything but". That last is from a review by a retired American Army officer, from another link.
I didn't see one single link to a website with a moslem-sounding name. (Although it's true, I only spent about 10 minutes poking around.)
Whatever the intended purpose the Nazis may have had in raising and organizing this military unit, the record apparently speaks for itself. ...As does the fact that it was (thanks to Himmler) the very first "non-Aryan" SS unit incorporated into the 1,000 Year Reich's Order of Battle. One would suspect that stoutly anti-Jewish attitudes might have had something to do with that.
Didn't they finesse this and consider Croats to be not Slavs but Aryans? Germans were never consistent on race. Over 100,000 men of Jewish heritage served in their military too.