Several people have asked me for references for books about Ed Kemper. Many of the books that have been published through the years contain inaccuracies or take a sensationalistic approach to the case. But there are a few good books out there, starting with L’OGRE DE SANTA CRUZ by French writer Stéphane Bourgoin, who is specialized in the study of serial killers and criminal profiling.
Bourgoin met with Kemper in 1991 and interviewed him for several hours. Some video of that interview can be found on the internet. Bourgoin published his book in 1998 and it is available only in French, unfortunately. I find this book to be the best written about the Kemper case, as it is based on interviews with him.