Some time ago I asked you if you would be interested in a book about Erlang performance. [1]<p>There were many people interested, but the publishers I talked to were not interested. So I wrote a book about designing Command Line Interfaces and writing Command Line Clients instead and published it on my own (<a href="http://theclibook.com" rel="nofollow">http://theclibook.com</a>)<p>As I still have material from the draft I sent out to the publishers I decided to publish the content on my blog. I hope you enjoy!<p>Robert :)<p>[1] <a href="https://news.ycombinator.com/item?id=10047444" rel="nofollow">https://news.ycombinator.com/item?id=10047444</a>