The Mark of Cain by Carolyn Wells is a riveting detective novel that plunges readers into a world of crime and conspiracy. When a renowned scientist is found dead, marked by a cryptic symbol, detective Fleming Stone is called to solve the chilling case. As Stone delves deeper, he uncovers a complex web of motives and secrets, each thread pointing to a different suspect. With every clue leading to more questions, Stone must navigate through deception and danger to reveal the true culprit. Will he crack the case before the killer strikes again, or will the sinister mark of Cain remain an unsolved mystery? Get ready for a suspenseful journey full of unexpected twists and turns.

Carolyn Wells (1862–1942) was an American author and poet known for her mystery novels, humor writing, and children's literature. She wrote over 170 books, including mystery stories featuring detective Fleming Stone. Wells initially gained fame through her nonsense verse and light poetry but later focused on mysteries influenced by Anna Katharine Green. Some of her notable works include The Clue and The Gold Bag. Her diverse writing made her a significant figure in early 20th-century American literature.