Supernatural Detectives 4 focuses on two early female psychic detectives. It includes the six Shiela Crerar stories, following her adventures with the otherworldly, whether ghost, werewolf, or other supernatural creature. It also includes the full-length novel, The Undying Monster (1922), featuring the "Supersensitive" Luna Bartendale, where her intelligence, intuition, and courage are put to the test as she confronts a cruel and bestial creature that haunts the lineage of an old family.