"Well-versed" https://dictionary.cambridge.org/dictionary/english/well-versed https://dictionary.cambridge.org/dictionary/english/well-ver... I only used "book

"Well-versed" https://dictionary.cambridge.org/dictionary/english/well-versed https://dictionary.cambridge.org/dictionary/english/well-ver... I only used "book smart" as it is an Americanism and this site has a large American and/or people who learnt to speak en-US. I don't think anyone else would use that term.