Check Your Orders on Amazon — it’s listed with each order, formatted like 112-3456789-1234567. If you received the book as a gift, use the "I don’t have an Order ID" option on the registration page instead; you’ll photograph a page as proof of ownership.

Reviews are typically completed within 1 business day. You’ll get an email either way — approved or rejected with a reason and a chance to retry.

Your first wrong answer costs you nothing — correct your work and file again straight away. From the second wrong answer on, each miss starts a wait before the portal reopens: one hour, then two, then four, then eight, then a day for every miss after that. Each puzzle keeps its own count, and a week away from a puzzle resets its count to the start. Use the wait to re-check your work — the seventeen printed clues get you to the final two on their own; Clue 18, from your registration email, breaks the tie.

Platinum (day 1) · Gold (days 2–7) · Silver (days 8–30) · Bronze (day 31 or later) — measured from registration to a correct location claim.

No — Display Name is optional at registration. Leave it blank and you’ll appear as "Claimant #—" instead. Your email address is never shown publicly either way.

There is. Correct claims unlock a second puzzle — Edmund’s private murder investigation. Two hundred suspects. One guilty name. That’s all we’ll say.

No — badge tier and leaderboard position are both determined by the location phase alone (days elapsed between registration and a correct location claim). The murder puzzle is a separate reward.

No — unlike the leaderboard, filing isn’t a race. Every correct claim joins the same growing record of independent discoveries, whether you’re the 1st or the 4,000th to file. That volume is what matters: a single claim is easy to contest, but thousands of independent people solving the same puzzle and landing on the same answer is very hard to argue with. Claims typically take 1–3 years to process.

Yes — each real Amazon order can register once. Two separate orders means two valid registrations, whether that’s for yourself and a gift, or any other reason.