In this spine-tingling sequel to Leroux's The Mystery of the Yellow Room, the reader again finds journalist-turned-detective Joseph Rouletabille pitted against his rival and enemy Frédéric Larson. Rouletabille attempts to untangle the complexities of a vicious crime committed in the Square Tower. Brimming with psychological twists and turns, readers will need all of their wits about them to deduce the events that transpired in this classic locked-room mystery.