Ruediger Hermann Grimm, Nietzsche's Theory of Knowledge, Walter de Gruyter, 1977.

Excerpt:

If one were to choose that modern thinker who has been more misunderstood and maligned than any other, I have little doubt that a consensus of opinion would award that dubious honor to Friedrich Nietzsche. The name of Nietzsche has for years elicited a stream of invective from devout Christians (to name but one group), for whom Nietzsche took great pains to be as offensive as possible. I well remember my pious Bavarian grandfather muttering anathemas when that name was uttered by the careless student who was his grandson. And this is by no means simply the result of an innocent misunderstanding, for Nietzsche himself invited such abuse by his incendiary language and often lurid examples. Even in the intellectual world, the name of Nietzsche very often divides a group of scholars very neatly into two camps: those who make Nietzsche their patron antisaint and ape his healthy contempt for all that is mediocre (meaning anything which they happen to dislike), or those who make Nietzsche their whipping boy for all the cultural ills of the modern world.

Online:
Amazon