Break Codes Like Alan Turing.
Decipher real coded letters and telegrams from world history. Learn new codes and explore secrets of the past monthly.
Join monthly for $8.99 or try one for $10.99.
— Andrew W.
★★★★★“Gave Letterjoy to my Dad for Father’s Day. He loves the letters. Best gift I ever gave him!” — Lisa L.
★★★★★“My husband said this is the best Father’s Day gift he has ever gotten. He loves the letters!” — Susan L.
★★★★★“Got our first one yesterday! My 12 year old history obsessed son loved it.” — Jen M.
★★★★★“My father really enjoys his letters. Received his first one after Father's Day and looks forward each week to the next one.” — Robert K.
★★★★★“Got my dad Letterjoy for his birthday, and the first one arrived today. Heard from him right away - he loved it!”
"Like Sudoku For Spies"
Think you'd make a good spy? Join the Codebreaking Club and put your cryptanalyst skills to the test with one real secret message from the past each month.
Never solved a cipher before? With the Codebreaking Club, learning to solve ciphers is easy.
Every Codebreaking Club envelope includes step-by-step instructions for deciphering your latest message. You'll be cracking codes in no time!
Each Codebreaking Club envelope includes:
- A Secret Code: A replica of a real coded letter or telegram from the past for you to try your hand at deciphering, mailed on beautiful stationery or parchment.
- Decoding Instructions: A short guide to help you decipher your latest message.
- The Story of Your Message: Below your instructions is a short article telling the story of your latest message and the figures from history who wrote and deciphered it.
- A Decoded Transcript: Flip your instruction sheet upside down to see a transcript of your latest message, fully deciphered, and see how you fared.
- First-Class Postage: All Codebreaking Club secret codes are delivered via USPS First-Class mail.
Shipping Timeline: Members who join today will receive their first Codebreaking Club Code in September.
Codebreaking club coded messages are mailed out at the start of each calendar month.
An Intriguing Gift That Keeps On Giving
Delight the puzzle lovers, math nerd, or history buff in your life with a gift that will deliver hours of joy every month.
With a flexible membership length, membership to the Codebreaking Club is a great gift for any occasion.
Need a small thank-you gift or a get-well-soon surprise? Send two or three months of coded messages.
Want a grand birthday or Christmas surprise? Give your codebreaker an ongoing subscription for a gift that keeps on going. With our easy subscription management, you can pause or cancel your membership at any time.
A Unique Screen-Free Supplement To Your STEM & History Curriculum
Liven up your lesson plans with secret codes. Each edition of the Codebreaking Club is a self-contained, screen-free, hands-on activity. Students can work independently or collaborate in groups.
Through the Codebreaking Club, your students will engage deeply with historical figures, concepts, and events from their textbooks and receive an introduction to the world of cryptanalysis, ciphers, and signals intelligence.
Codebreaking Club memberships are available in bulk for schools, clubs, and learning pods.
Our secret codes are also available in a growing list of state ESA marketplaces to serve homeschool and unschooling families.
A Window Into the History of Spycraft and Intelligence
Throughout history, spies and counterintelligence professionals have waged a clandestine war over information. These battles are fascinating and historically significant, but because of the nature of the work, they're also extraordinarily hard to follow.
Our goal with the Codebreaking Club is to make the methods these spies, soldiers, and diplomats employed to smuggle information across enemy lines, the methods used to break their codes, and the classified intelligence they were smuggling, accessible.
If you like reading about topics like the Culper Spy Ring, "Room 40," Bletchley Park, OSS, CIA, DIA, and NSA, you'll love this series.
Please Note: Unlike most Letterjoy products, which are weekly, The Codebreaking Club publishes one coded message a month.
As Seen In
Member Testimonials
★★★★★
"My 12 year old history obsessed son loved his Letterjoy. It’s not just the letter- it’s the info that comes with it. My son is on Scholar Bowl and he sees these as a treasure trove of info. Took it to school today to share with team. Thank you!"
— Lauren, Florida
★★★★★
"If you are looking for a great holiday gift for someone in politics or who likes history I have really enjoyed @Letterjoy . They send you a historical letter each week and they are fascinating. One week might be from a WWII general & the next week about natural ice in the 1920s."
— John, Alabama
★★★★★
"We did the Letterjoy thing as a Christmas gift for our son, and I’m definitely the biggest beneficiary. I read them aloud to the whole family, in the accent/voice I imagine each author would have had."
— Stephanie, New York
