Infinite intruder

When Roger Strang found that someone was killing his son-killing him horribly and often-he started investigating. He wasn’t prepared for the results, nor was he prepared for the results of another investigation-this one about his own life.

Alan Edward Nourse (1928-1992) was an American science fiction author and physician. He wrote both juvenile and adult science fiction, as well as nonfiction works about medicine and science. His SF works generally focused on medicine and/or psionics. Psionics refers to the practice, study, or psychic ability of using the mind to induce paranormal phenomena.