Show HN: Ruby on Roda – REST APIs with Roda and Sequel

Hi, today I released my book, which describes how to build a Ruby application with Roda and Sequel. Almost ten years of working with the Ruby on Rails framework meant that I started looking for an alternative way to build web applications using the Ruby language. This book shows how to build, document, and test a REST API. I invite all fans of the Ruby language. I am curious about your opinion, each one is welcome, even the negative ones :) I created a special coupon code for the hackernews community that gives a 20% discount:

https://leanpub.com/rubyonroda/c/hackernews