https://www.informit.com/authors/bio/2C900443-7407-4C94-9FA7-E1DEAC901796
David A. Black | InformIT
david a blackinformit
https://www.manning.com/books/the-well-grounded-rubyist-third-edition
The Well-Grounded Rubyist, Third Edition - David A. Black, Joseph Leo III
From beginner to master, learn Ruby inside and out with this definitive guide.
david a blackthe wellthird edition