Simon Willison’s Weblog

Mr. Penumbra's Twenty-Four-Hour Book Store. Enormously entertaining short story about data visualisation and creepy San Francisco bookshops by Robin Sloan.

Posted 12th June 2009 at 6:07 pm

Recent articles

The last six months in LLMs, illustrated by pelicans on bicycles - 6th June 2025
Tips on prompting ChatGPT for UK technology secretary Peter Kyle - 3rd June 2025
How often do LLMs snitch? Recreating Theo's SnitchBench with LLM - 31st May 2025

robin-sloan 4 bookshops 1 san-francisco 27 visualisation 15 shortstory 1

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