Complex sentence: The accuracy of the book has been questioned due to minor inconsistencies in Wehrmacht procedures or uniform details and allegations have ranged from its being an outright hoax to simply a historical novel in the vein of All Quiet on the Western Front.
Split into simpler sentences: The accuracy of the book has been questioned due to minor inconsistencies in Wehrmacht procedures or uniform details. Resulting allegations have ranged from its being an outright hoax to simply a historical novel in the vein of All Quiet on the Western Front.