请举出20个关于rails 实现 saas多租户系统的教程或书籍

1.《Rails 4 in Action》 2.《Agile Web Development with Rails 4》 3.《Service-Oriented Design with Ruby and Rails》 4.《Rails AntiPatterns: Best Practice Ruby on Rails Refactoring》 5.《The Rails 4 Way》 6.《Practical Rails 5: Building Social Networking and News Site》 7.《Rails 5 Revealed: Discover What's New in the Latest Version of Ruby on Rails》 8.《Ruby on Rails Tutorial: Learn Web Development with Rails》 9.《Mastering Modern Web Penetration Testing with Ruby on Rails》 10.《Learn Ruby on Rails》 11.《Ruby on Rails: Up and Running》 12.《Professional Ruby on Rails》 13.《Ruby on Rails Enterprise Application Development: Plan, Program, Extend》 14.《Ruby on Rails Tutorial: Learn Web Development with Rails》 15.《Deploying Rails: Automate, Deploy, Scale, Maintain, and Sleep at Night》 16.《Ruby on Rails: Power!》 17.《Ruby on Rails for Microsoft Developers》 18.《Ruby on Rails for PHP and Java Developers》 19.《Ruby on Rails for Dummies》 20.《Rails Cookbook: Recipes for Rapid Web Development with Ruby