The Jekyll Legacy is a novel co-written by Robert Bloch and Andre Norton. It was published in 1991 and was billed to be a sequel to Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson.
Description[]
After arriving in England to claim her inheritance, Hester Lane, niece of Dr. Henry Jekyll, discovers she gets nothing, and suddenly her friends are untrustworthy and aloof. Hester becomes entangled in her uncle's mysterious past, and a series of brutal deaths cause her to wonder if London's seen the last of Dr. Jekyll - or Mr. Hyde.