read someone like a book (rīdo samuwan raiku a bukku)

Idiom Communication and Understanding

意味

to easily understand someone's thoughts and intentions

誰かの考えや意図を簡単に理解する (dareka no kangae ya ito o kantan ni rikai suru)

例文

"She can read him like a book and always knows when he's lying."

"彼女は彼を本のように読むことができ、いつも彼が嘘をついていることがわかります。" (kanojo wa kare o **hon no yō ni yomu** koto ga deki, itsumo kare ga uso o tsuite iru koto ga wakarimasu)