You might enjoy these titles if you liked The Bad Beginning by Lemony Snicket.
Shakespeare’s Secret, by Elise Broach.
Named after a character in a Shakespeare play, misfit sixth-grader Hero becomes interested in exploring this unusual connection because of a valuable diamond supposedly hidden in her new house, an intriguing neighbor, and the unexpected attention of the most popular boy in school.
The Mysterious Benedict Society, by Trent Lee Stewart.