The post discusses a newly written Command Line Handbook that aims to teach users about the Linux command line. Comments highlight a mix of positive feedback and suggestions for improvement regarding the book's landing page and format. Users are eager for more clarity on the intended readership (beginners vs. advanced users) and expressed the need for specific examples or a contents page to assess the book's value. Additionally, some technical issues on the website and format preferences for eReader compatibility (such as EPUB) were mentioned, influencing users' purchasing decisions.