Robertsoner Ruby  (Bengali, Hardcover, Ray Satyajit)

Feluda and Co. travels to Birbhum, where they meet Robertson who has come all the way down from London to return a ruby which his forefather took away to UK. Threatened by local goons, lured by rich merchants, frustrated by his friend's despicable and insensitive behaviour, Robertson decides to sell off the gem, just when it's stolen. Who is the culprit? The sleuth takes up the task.
An awesome book to read.