Marc B. Shapiro has a new book out: "Studies in Maimonides and His Interpreters"
Included in the book is a short "Note on Maimonides and Muhammad" following censorship that occurred in his "Islam and the Halakhah," Judaism 42:3 (Summer 1993): 332-343, about which Shapiro writes:
The "Note on Maimonides and Muhammad" found at the end of the English section requires a bit of explanation, as it speaks to the times in which we live and the sometimes precarious state of scholarship when it comes up against larger political forces. In 1993, I published an article in Judaism entitled "Islam and the Halakhah." In the version of the article submitted to the journal, I mentioned that Maimonides referred to Muhammad as a "madman," and in a few lines I also explained the origin of the term. When the article appeared in print, however, I was surprised to find that this had been removed without my knowledge. Naively, I thought that this was an innocent mistake, and I inquired as to what had happened. Imagine my shock when I was told that my article had been censored because the journal did not want to publish anything that could be seen as offensive to Muslims! While some may see this as understandable in the wake of the Salman Rushdie episode, it was nevertheless a betrayal of scholarship, which cannot be guided by political correctness. I would hope that any Muslims who see the "Note on Maimonides and Muhammad" will understand that its intent is not to insult their prophet, but rather to clarify a historical issue.
Studies in Maimonides and His Interpreters is available for purchase here at Amazon.com.