Two free books
No payment, no card, no catch. Just an email address so we know where to send them.
The taster
Free
Twelve puzzles — three from each of the 333, 444, 555 and 666 series — with the solving guide at the front and every answer at the back. Enough to find out whether Trigons are for you. They usually are.
The bigger one
Also free
A fuller book — around thirty puzzles — for anyone who wants a proper go. This one comes with a subscription to the blog: solving techniques, the history behind the puzzles, and the occasional extra. Stop it whenever you like.
We'll email you the book, and after that only when there's something worth saying. Never passed to anyone else. One click to stop, on every email we send.
What you'll need
A printer
The books are PDFs, made to be printed. Print one page at a time or the whole thing. Print the same puzzle again if you make a mess of it.
A pencil
And a rubber. Trigons are meant to be worked in pencil — you will change your mind, and that's part of it.
Ten minutes
A 333 puzzle is a coffee break. A 666 can take an evening. Start small and work up.
Not sure yet?
Play one online first. No email needed, no printer needed, nothing to install.
Play today's puzzle See how it works