1) Peter Henry Abrahams (born 1919-03-19 died 2017-01-18; The South African writer of such books as Mine Boy, Wild Kingdom and A Wreath of Udomo is pictured in the alternate author photo.
2) The thriller/crime writer, pictured in the primary author photo (born 1947-06-28; "author 2" in CK above) wrote Down the Rabbit Hole.
3) The author of several books on biology and human anatomy, more properly known as Peter H. Abrahams. (Those who wish their anatomy books properly combined should change the author to Peter H. Abrahams).
4) Peter Abrahams, of Portland, Oregon, writer on the history of telescopes and binoculars.