The best Puzzles newsletters

James Lyndsay of Workroom Productions shares an itemised, self-audited account of what his company spends on LLM API usage, and why he deliberately avoids subscription billing. The newsletter also includes essays on the hidden costs of AI and a logic puzzle.

A newsletter publishing write-ups and stories for story-driven OSINT and steganography capture-the-flag challenges run through a Discord community. Each issue walks through a challenge's solution, with post-mortems on puzzles nobody solved.

A newsletter of variety puzzles and cryptic crosswords, each issue presenting a themed puzzle with a short editorial note about the solving crew and related puzzle projects. Readers get new free and subscriber puzzles plus recommendations for other puzzle publications.

A retailer's blog covering speedcubing: competition announcements, store feature updates, and explainers on how speedcubes work. Readers get news on Bangladesh's cubing scene and practical product information from the CubeNation shop.

A bimonthly-style collection of varied cryptic crosswords delivered by email, with each issue offering a fresh set of puzzles. Readers who enjoy solving cryptic clues get a steady supply of new grids to work through.

Signals is a daily puzzle newsletter from The Mystery League built around Raddle word puzzles, each week themed on a musician's work, currently Phoebe Bridgers. Issues mix a puzzle call-to-action with short trivia notes about songs and albums, plus announcements about mystery themes and winners.

A puzzle author's newsletter promoting printable logic and variety puzzle books, with affiliate links and self-promotion dominating the issues. A later issue shifts to a long technical post about how the Claude Code assistant stores and reads its memory files.