Letter shifts and Detective Code are different
How the decoder ring works
Check the code named in your case before choosing a method. The rotating alphabet dial supports a letter shift; the Detective Code shown in the publisher's Volume 1 preview uses a reversed alphabet.
For a shift cipher, move every letter the same number of positions, wrapping around the alphabet. Detective Code instead pairs A with Z, B with Y, C with X, and so on, as shown in Exhibit A of the publisher's Volume 1 preview. The official website offers a rotating dial and a separate Detective Code button. Do not confuse either substitution with an anagram, which changes letter order.
- Copy the coded line onto paper.
- If the clue says Detective Code, use the reversed alphabet. If it specifies a shift, align the alphabets by that shift.
- Apply the same letter mapping to the entire line. Original example: HELLO becomes SVOOL in reversed-alphabet Detective Code.
- Only then mark the grid. The code is a clue, not the solution.
RP Minis lists a 2-inch metal Secret Decoder Ring with a 48-page mini book, ISBN 9798894143699, for US publication on 2026-10-27. Its checked list price is $14.95 USD. As of 2026-10-01 it is a preorder, not an already released accessory. The physical product is optional; paper alphabets work for these substitutions.
Source: Profile Books: authorized Volume 1 preview. Exhibit A shows the reversed alphabet; checked 2026-10-01. External publisher file, not mirrored here.
Source: Escape the Crypt. Official serial. Accessed 2026-10-01.
Source: Hachette decoder ring. ISBN 9798894143699. Accessed 2026-10-01.
Watch a walkthrough
Miss Murdle walks through the deduction grid, the statements, and the accusation. The video stays unloaded until you press play.
Questions and answers
Do I need the physical ring?
No. Any two alphabets written in a circle will do. The product is for the mini book that ships with it.
Is every coded clue a shift?
No. Detective Code in the publisher preview uses a reversed alphabet. Read the case instructions and select the indicated substitution before applying it.