Debi is the first Misir Ali novel by Humayun Ahmed, the book that introduced one of his most original characters. A young woman named Ranu seems to have unusual mental abilities, and Misir Ali is asked to look into it. The book moves between rational explanation and something stranger, and never quite lands on either side.
For anyone curious about the Misir Ali series, this is where to begin. Short, atmospheric, and unsettling in a way that stays with you.