还是 CodeMirror 的作者。
这本书是免费的:http://eloquentjavascript.net/
上面还可以下载到 PDF 版本(以及适合手机看得小 PDF 版本)。
Code sandbox and exercise solutions
Errata for the paper book
This book as a single PDF file (& small version for mobile)
This book as an EPUB file
The first edition of the book