A free book about font design, Unicode and the computer processing of complex text, by Simon Cozens.

• A brief history of type
• Font Concepts
• The Unicode Standard
• How OpenType Works
• Introduction to OpenType Features
• Substitution and Positioning Rules
• OpenType for Global Scripts
• Advanced Feature Programming
• Layout Challenges in Global Type
• Rasterisation and Hinting
• Fonts on the Web
• OpenType for Programmers: Freetype2
• Text Layout for Programmers: Harfbuzz
• Text Layout for Programmers: libraqm

Acknowledgements

Many thanks to contributors and bug finders: Khaled Hosny, Georg Siefert, Michael Aars, Peter Constable, and Rob McKaughan.

Thanks also to sponsors and backers: Google Fonts, Jeremy Tribby, Lukas Prokop.