This is the official metadata and landing page repository for the ‘Neural Networks and Deep Learning’ (nndl) textbook series. It contains _meta.yml files that feed into the book’s main website (nndl.ai). The repository links to companion repositories including nndl-practice (PyTorch/Paddle implementations) and llm-beginner (large language models and agents). The actual book chapters and exercises are not in the public repo, with the 2nd edition and general education edition both slated for 2026 publication.