A personal mission
A confidential letter invites them into the Society and sets the story in motion.
Mystery by post · Ages 7–11
A mysterious letter. A case only they can solve.
Turn the post into an adventure with illustrated clues, curious suspects and secret codes—delivered straight to your young detective.
✉ Beautifully printed⌛ 45–60 minutes★ Screen-free
SPECIAL
DELIVERY
DELIVERY
CASE 01The Vanishing Moonstone
Inside the envelope
Everything needed for one unforgettable case
Clues worth examining
Illustrated suspect cards, coded notes and puzzles designed for curious minds.
An official case report
A place to record their theory, explain the evidence and reveal the solution.
A thread to the next mystery
Every solved case leaves one final discovery—and the promise of another adventure.
How it works
From letterbox to lead detective
No app, no complicated set-up and no grown-up detective work required.
The mystery arrives
A beautifully illustrated case lands through the letterbox, addressed to your detective.
They follow the clues
Read the story, compare statements, crack the code and investigate the evidence.
They solve the case
Complete the report, reveal the hiding place and discover the next tantalising clue.
Made for curious minds
It doesn’t feel like a worksheet. It feels like their case.
While they are immersed in the story, they are also reading closely, testing ideas, noticing patterns and explaining their reasoning.
- Builds confidence through independent problem-solving
- Encourages reading without feeling like homework
- Creates anticipation around receiving real post
Now recruiting young detectives
Begin with The Vanishing Moonstone
At 8:17, every light in the Museum of Curious Things went out. Sixty seconds later, the Moonstone had disappeared from its locked case. Three suspects remain. Only one is telling the truth.
Start with Case 01You’ll complete your purchase securely through Stripe.
Before you join
Questions from grown-ups
What age is it designed for?
The puzzles and story are designed for children aged 7–11. Younger detectives may enjoy solving alongside a grown-up.
Does an adult need to prepare anything?
No complicated preparation is required. Keep the grown-up answer guide separate, then hand over the case envelope.
Is it a subscription?
Yes. Your detective starts with Case 01 and a new mystery follows with each dispatch. You can pause or cancel at any time from your account, and nothing further is sent.
How do I pay?
The order button opens a secure Stripe checkout where you can enter payment and delivery details.
Confidential invitation