A Mysterious Gift That Keeps On Giving.
Liven up the mailbox of the sleuth in your life with tricky monthly mysteries to solve.
Use three clue letters to crack each case, then read your letter from Sherlock Holmes to confirm your theory of the case.
Browse Mystery Bundles.
"Engaging and well-written."

"I got my first clue today. I've spent part of this evening trying to brute force decode the clue with some golang code, but no success. Such an interesting and entertaining gift."
— Matt F., Co. (Via X)
"Dear Holmes is a delight, with intriguing mysteries brought by characters that could have walked straight out of a real Sherlock Holmes story. My husband and I eagerly looked forward to every letter."
— Maria Alexander, Award-winning author
"Well done on a fantastic mother's day gift. My mother and her friend are greatly enjoying their mystery subscriptions. They're well written and a joy to read."
— Roo C., California (Via X)
"I got my first clue today. I've spent part of this evening trying to brute force decode the clue with some golang code, but no success. Such an interesting and entertaining gift."
Matt F., Colorado (Via X)
"Dear Holmes is a delight, with intriguing mysteries brought by characters that could have walked straight out of a real Sherlock Holmes story. My husband and I eagerly looked forward to every letter."
Maria Alexander, Award-winning author
"Well done on a fantastic mother's day gift. My mother and her friend are greatly enjoying their mystery subscriptions. They're well written and a joy to read."
Roo C., CA. (Via X)
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