Even in death, the John McAfee saga grows stranger. More than seven months after he died in a Spanish jail, McAfee’s body remains in a prison morgue freezer somewhere in or near Barcelona. His daughter and ex-wife waged a legal fight over the body and a Spanish judge is continuing to conduct an investigation over the cause of his death. At the same time, the first of what is expected to be several attempts to detail the hard-to-believe exploits of the antivirus-software pioneer has arrived, a book whose contents are vigorously denied by McAfee’s family. It is unclear to those...