Carnegie-Stout Public Library will offer a mystery-by-mail program to Dubuque resident cardholders.

During the month of May, selected participants will receive weekly letters in the mail with new clues to help Sherlock Holmes solve a Victorian-era mystery, according to a press release. Participants will attempt to solve the case before a final letter reveals how Holmes solved the case.

The program is made possible by, a letter-based subscription service. The program is free but participation is limited and registration is required.

Register by visiting or calling 563-589-4225 by April 16.

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