Typographical errors are extremely easy to make and nearly everyone makes them. Sometimes, however, the results can be amusing.
At the top of the copyright page of Maarten J. Raven's book, Egyptian Magic: The Quest for Thoth's Book of Secrets, Raven (or his publisher) thanks various publishing establishments for permission to quote from various translations. One author mentioned is a certain J. K. Ritner. I wonder if someone confused R. K. Ritner with J. K. Rowling? Both can write well, and both write about magic, but I doubt that anyone who knows either would ever confuse them.