I read his translation of the Epic of Gilgamesh, may still have it in my book collection, disorder.
Here are some of his books. He is, in case you are unaware a science historian and Egyptologist.
No aliens.
A good bit of
“The Egyptian Dawn” and “The Sphinx Mystery” are online as well as lots of images he & his wife took while at various sites many of the images are from sites closed to tourists and undocumented. They were granted access to the Valley Temple and the Sphinx Temple.
Egyptian Dawn (The Old Kingdom and how it is dated - includes results of his optical biothermolucence dating of several sites above and below ground.)
http://www.egyptiandawn.info/chapter1.html
Sphinx Mystery (What the Sphinx may really be and why it was created)
http://sphinxmystery.com/
Crystal Sun (Uses of lenses in Old Kingdom and prior)
http://www.robert-temple.com/crystalSunMain.html