Where to continue learning Ruby after SoloLearn?

Question

When I complete this course, where should I go next to learn and upgrade my knowledge of Ruby? (books are more than welcome, but websites and/or softwares are preferred) Any suggestion will help. Thanks in advance :)

P.S. I'm not completely new to programming, I have C++ experience, if this helps at all.

Answer 1

Thank you for your response :)