সত্যজিৎ রায়ের বাদশাহী আংটি

Badshahi Angti (English title: The Emperor's Ring) is a novel by Satyajit Ray, featuring the private detective Feluda. It was first serialized in Sandesh magazine in 1966–67 and later published as a book by Ananda Publishers in 1969. This is the very first Feluda novel written by Ray, marking the beginning of a beloved detective series.

The story introduces Feluda, a sharp and intelligent private detective, along with his cousin Topshe, who serves as the narrator. The plot revolves around a missing ring that belonged to the Mughal emperor Aurangzeb, leading to a thrilling adventure involving history, mystery, and Ray's characteristic charm.

The novel's success set the stage for a long and popular series of Feluda adventures, making it a landmark in Bengali literature.