Rabbi Dr. Nathan David (Nosson Dovid) Rabinowich stole the work of a 19th Century Jewish scholar. Here's what he did and how he got out of it.
Rabbi Natan David Rabinowich
"After I published my book on Saul Lieberman and the Orthodox a number of people pointed out to me that Nosson Rabinowich's plagiarim of Mielziner is more extensive than what I point out. I didn't know what they were referring to since I had the first edition of his book M. Mielziner's Talmudic Terminology, published in 1988 (in my kuntres there is a typo, as it says 1998). Or so I thought. I succeeded in locating another copy by interlibrary loan, and lo and behold, the title page does not say M. Mielziners Talmudic Terminology adapted by N. Rabinowich but it dentifies him as the author. What's even more fascinating is that the other edition has haskamot of Rabbis Ovadiah Yosef and Aharon Feldman. Obviously when the scandal broke, Rabinowich quickly produced a new title page and took out the haskamot (and also added a note on p. xv and made a slightchange in note 2 on. p. xv (replacing "some" with "most".) It is obvious why the haskamot were taken out, since they praise Rabinowich for producing a book which he didn't write. In fact, Rabinowich is responsible forsomething very interesting. We find here the first example in history where gedolim put a haskamah on a work written by a Reform rabbi! Unknowingly Rabbis Yosef and Feldman gave a haskamah to Mielziner. You can be sure this is not something that makes them happy."
Here is Rabbi Ovadia Yosef's endorsement of Rabinowich's first edition, the first edition's title page, and the second edition's title page showing the book is "adapted by" Rabinowich.