lycl

An open source book

Author

Artem Rusin

Published

November 3, 2026

Preface

Welcome to lycl — an open source book written in public.

The latest version of this book is always available at https://lycl.org. You can also download it as PDF or EPUB using the buttons in the sidebar.

How this book is made

The book is written in Markdown and kept in a public Git repository on GitLab. Every change merged into the main branch automatically rebuilds the website and the downloadable editions.

License

This book is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). You are free to share and adapt it, as long as you give appropriate credit.