99 Bottles of OOP (Beer, Ruby)
Sandi Metz & Katrina Owen & TJ Stankus
99 Bottles of OOP (Milk, Ruby)
From Ruby to Elixir
Stephen Bussey
Polished Ruby Programming
Jeremy Evans
Programming Ruby 3.2
Noel Rappin & Dave Thomas
Programming Ruby 3.3
Dave Thomas & Noel Rappin