Ellery Queen is struggling over his latest book when a friend brings him a mystery. It is a journal, written by a Victorian doctor, of reports on the remarkable adventures of his close friend, a brilliant detective named Sherlock Holmes. Queen's surprise turns to amazement as he turns its pages and discovers the lost story of Sherlock Holmes's greatest case: the pursuit of Jack the Ripper. From the brothels and back alleys of fog-choked Whitechapel to the manor of one of England's greatest families, Holmes and Dr. Watson chase history's most fearsome killer. But it will take the brilliance of Ellery Queen to solve the case once and for all.

Based on the Sherlock Holmes film A Study in Terror, this collaboration between two of the world's greatest detectives is one of the most original mystery novels of all time.