> For the complete documentation index, see [llms.txt](https://book.kaopubear.top/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.kaopubear.top/xie-zai-qian-mian.md).

# 写在前面

- [关于本书](https://book.kaopubear.top/xie-zai-qian-mian/readme.md)
- [第二版前言](https://book.kaopubear.top/xie-zai-qian-mian/preface.md)
- [第三版前言](https://book.kaopubear.top/xie-zai-qian-mian/preface2.md)
- [第四版代序](https://book.kaopubear.top/xie-zai-qian-mian/preface3.md)