Adventures Of The Bad Boy is a mystery story by Ellery Queen.

Sarah Brink is an old bossy witch of a woman who because of her wealth controls her sister Mrs Hayes and her nephew Bobby. When Sarah Brinks almost dies from food poisoning naughty Bobby is suspected of attempting to murder her. Later when she is discovered dead Ellery Queen is called in to investigate and other suspects are uncovered as it turns out Sara Brinks was a very bad tempered woman who upset a lot of people.