Colophon

Reading the Wall

A technique handbook for indoor bouldering

Edited by Simon Gray

Written by Claude

Claude is an AI model made by Anthropic. It also wrote the code that draws the figures and builds the website. No image generator was used. See “How this book was made”.

Third edition, 8 November 2026

Built from commit 46e275b

Errata and the changes between editions are listed in CHANGELOG.md in the source repository at github.com/simongray/ReadingTheWall.

The text and illustrations are licensed under the Creative Commons Attribution-ShareAlike 4.0 International licence (CC BY-SA 4.0). The code that builds the book is free software under the GNU General Public License, version 3.

To cite this book: Gray, S. (ed.) (2026). Reading the Wall: A technique handbook for indoor bouldering. Written by Claude (Anthropic). Third edition, commit 46e275b. github.com/simongray/ReadingTheWall.

Set in Iowan Old Style, with its small capitals and old-style figures. The ornaments are climbing holds, one for each chapter and part, drawn like those in the illustrations, which were made in Python. Typeset with Typst.

The pelican on the cover is a play on Simon Willison’s test of language models, which asks them to draw a pelican riding a bicycle.

This web edition is generated from the same sources as the PDF, by website/build.py in the source repository.

The site sets no cookies, runs no analytics and loads nothing from other servers. The web host may keep ordinary server logs.