Bookshelf

Books and long-form notes.

The things I have published in book form, together with writing substantial enough to read like a small free book.

Published · 2026

Little Coders

A Screen-Free STEM Coloring & Activity Book for Kids Ages 4–8

A playful introduction to coding, robots, algorithms, loops, binary, pixels, networks and password safety. Available in English, Portuguese, Spanish and French.

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UNIXNotes on modern Unix-like systems

Free online book

UNIX

Notes on modern Unix-like systems

Study notes on modern Unix-like systems: history, terminals, documentation, filesystems and permissions.

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