Hi, I hope this post does not break group rules.
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 forum community that gives a 20% discount: