The Fall of the Amazing Zalindas (Sherlock Holmes and the Baker Street Irregulars) - Tapa dura

As assistants to the great detective Sherlock Holmes, the Baker Street Irregulars find themselves involved in another dangerous case when a murder takes place at the circus and the culprit will stop at nothing to make sure he isn't caught, enhanced with puzzles, maps, a glossary of Cockney slang, and more.

Tracy Mack is the author of two celebrated novels: BIRDLAND, a Book Sense Top Ten Book, a Sydney Taylor Award Honor Book, and an ALA Best Book for Young Adults; and DRAWING LESSONS, a Booklist Top Ten First Novel and a Teen People NEXT Award Finalist.
Michael Citrin is an attorney and has been a Sherlock Holmes fan since he was a young boy.
Together they have written the Sherlock Holmes and the Baker Street Irregulars series published by Orchard Books. Tracy and Michael are married and live in the Berkshire Hills of western Massachusetts with their three young children.