Build Your Own Lisp is an educational book and website that teaches C programming and language implementation by guiding readers through building a functional Lisp interpreter in under 1000 lines of code.
The project addresses the challenge of learning both C and compiler design simultaneously by providing a structured, hands-on approach. Rather than abstract theory, it walks readers through implementing a complete, working programming language from scratch, covering parsing, evaluation, and core language features. This practical method makes the concepts concrete and immediately applicable.
The book suits developers who want to understand how programming languages work at a fundamental level while strengthening their C skills. It works best for those with some programming experience who are willing to follow a guided, step-by-step curriculum. The project is primarily a learning resource rather than a tool for production use, so adoption decisions center on whether the teaching approach and scope match your learning goals.
The repository consists of HTML and website code for the book, served through Flask locally. The project welcomes corrections, edits, and contributions from readers. The book content is licensed under Creative Commons Attribution-NonCommercial-ShareAlike, while the source code examples are licensed under BSD3, allowing readers to use and modify the code they write while following the lessons.
