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The Gray Matter Sodality

A monthly, story-driven puzzle subscription about the theft of Einstein's brain.

SAVE $5 off your order with promo code CRATEJOY.
Plans as low as $25.00 / month
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Shipping & Renewal Information
  • You always start with "Mailing No. 1" no matter when you subscribe, so don't worry about ordering too late. When you order, we'll get your "Mailing No. 1" into the mail as soon as possible. Thereafter, we go to the post office on the 3rd of every month.
  • Only ships within United States
  • Subscriptions automatically renew. Cancel anytime
Help recover Einstein's stolen brain.
After Albert Einstein died, his brain was dissected and stolen. Join The Gray Matter Sodality to help recover and reassemble those stolen brain fragments. A unique subscription where every month you'll receive a multi-layered puzzle that contributes to the story of GMS and its unusual mission. Go month-to-month or buy multiple at once to SAVE.
  • Members receive a small piece of mail once a month consisting of a puzzle that contributes to the overall story of GMS. The puzzle each month is self-contained and has all the necessary pieces to complete. An occasional email may supplement those mailings.
  • Unique puzzles
  • An unusual and thrilling story
  • Challenging but not impossible puzzles



Q: How many months would it take to finish the whole storyline?Asked by Chewbakattack, September 2019

The Gray Matter Sodality answered...September 2019

"Season 1" is completed in 12 mailings. At the time of this posting, we're
working on Season 2!


Q: Do you need the Internet to solve the mysteries?Asked by Zayani M., June 2019

The Gray Matter Sodality answered...June 2019

Some internet access is needed, yes. For example, a handful of puzzles need
simple access to the internet for things like reading certain webpages,
watching a YouTube video, etc. Also, every puzzle works toward revealing
the URL of a webpage dedicated to that puzzle. That dedicated webpage lets
you know you've officially solved that month's puzzle and gives more of the
Plus, the help/hint system lives on our website. Hope that helps! Feel free
to email us using the Contact Seller button on our listing with any questions or concerns.

The Gray Matter Sodality reviewsReviews

Write a Review
6 reviews

Puzzles are good but...

Mar 07, 2019
Stephanie F.
10 Reviews
10 Helpful Votes
Subscribed for 3 months

I got my third month and I'm fairly disappointed. I've enjoyed the first two puzzles, but this last one requires a cassette tape player. I'm not sure if you guys noticed, but it's 2019, and I don't have access to a tape deck, and honestly haven't in at least 5 years. Even a CD is hard to play these days, but when I can't even work the puzzle? What a let down :(

Verified Purchase
The Gray Matter Sodality said...Jun 10, 2019

Oh no! While you totally can play the cassette tape to solve the puzzle (which comes with its own level of creepiness), you don't actually need to play it to proceed. The tools you need are all there. Still, we've tweaked the language on one of the included materials in case anyone else got caught up on the same thing. Thank you for being a member.

Great gift, great for yourself!

Nov 16, 2018
Kt S.
1 Review
3 Helpful Votes
Subscribed for 5 months

GMS sends out a monthly puzzle that is NEVER as straightforward as I think, and usually takes me a couple of days and more than one "aha!" moment to complete. I love how creative the various parts to these puzzles are, everything from a cassette tape to a coffee mug to mysterious phone numbers with cryptic answering machine messages. It's so much fun to have physical clues to manipulate, and that sets this puzzle subscription apart. I gave GMS as a gift to my daughters (and their husbands/partners), a friend and his wife, and my brother and his 14 year old son. All of them have had a blast working on it together and found it, as I have, interactive, challenging, a great bonding activity, and so much fun! If you're looking for a deviously clever monthly diversion, don't look any further -- GMS is the puzzle box you want! And it’s the perfect gift for that hard to buy for know-it-all-teen, game-loving Millennial, family gamenight aficionado, or sharp Baby Boomer.

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Challenging Puzzle Subscription

Oct 18, 2018
Mike D.
1 Review
3 Helpful Votes
Subscribed for 3 months

GMS consists of a monthly mailing in which you are tasked with locating fragments of Einstein's brain. The mailings take the form of a single, multi-step puzzle of above average difficulty. Because each month's puzzle is focused on a single theme/item, there could be a mailing which misses the mark for you. However, I have found those misses to be few and far between. In fact, one of the early mailings is hands down the best single puzzle I've encountered from these subscription based puzzle boxes. I would recommend that any who appreciates complex and intricate puzzles give GMS a try.

Verified Purchase

Great fun!

Mar 08, 2019
Wendy F.
24 Reviews
3 Pictures
35 Helpful Votes
Subscribed for 1 month

I am enjoying this subscription. Packages have a lot of material in them, and puzzles are well done. If you enjoy detective puzzle boxes this one is a fun one to try.

Verified Purchase

Challenging Imaginative Game

Apr 18, 2020
Agnes P.
4 Reviews
3 Helpful Votes

We started as only a 3 month subscription. After the first few boxes we received we switched to a full year plan, enticed by the creative, and varied nature of the puzzles. Each box presents different types of puzzles often not found in other "escape-the-box" esque subscription services. With every box comes with online hints that helped us solve the box without giving the answer straightaway. We look forward to the second season of GMS which the creator is currently developing.

Bob's First Review

Jan 10, 2020
Bob S.
1 Review

I'm in the early stages, but so far I like it.

Past boxes from The Gray Matter Sodality