Gift Guides

Buying for someone whose interests you can name but not navigate — “science stuff, robots, space”? Each guide below is a short, curated shelf: accurate designs, named blanks, and durability counted in washes, not adjectives.

• Gifts for ProgrammersReal cryptography and computing — Enigma, Diffie–Hellman, one-time pads — without a punchline in sight.
• Gifts for Math LoversNash equilibria, the prisoner’s dilemma, tit-for-tat — the real payoff matrices, drawn correctly.
• The Gift EditThe full gift shelf, across every series.