Table of contents : Title Page Table of Contents 1 Ruby on Rails and your First Application 2 Testing and You 3 Starting your SaaS App 4 Users are Everything 5 Business Models and Logic 6 Service Objects 7 Background Jobs, ActiveJob and Sidekiq 8 Mailers and You 9 HotWire 10 Stripe Payments and Subscriptions 11 Using Third-Party APIs in your Application 12 Speeding up Rails 13 Deployments 14 A Few Other Rails Tools