"The Human Remains From the Tomb of Tutankhamun", F. Filce Leek, Tutankhamun Tomb Series, Volume V, Griffith Institute (Oxford), 1972.
An official academic publication about Tut's mummy and the two mummified fetuses found in the tomb. It has Douglas Derry's original report. A short, thin volume you wish had more, particularly if you like reading about chopped up mummies. But if you're serious about Tut you'll get this volume before reading anything about "new revelations" of up-to-date investigations on poor Tut.