Allo, welcome to dev.to :)
I'm sure someone's going to recommend Sandi Metz OOP books because they're great, so I'll go with David Bryant Copeland's Rails, Angular, Postgres, and Bootstrap, Second Edition. This book really gave me a solid foundation of working with the front end and Rails, as well as a ton of Postgres tips, both general and specific to Rails. I recommend it as a book for anyone finishing a bootcamp and plan to stick with Rails.
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