read sb like a book

/ɹˈiːd ˌɛsbˈiː lˈaɪk ɐ bˈʊk/

to read sb like a book

to be able to easily understand what someone is thinking about or what their intention is

Examples

1. She can read me like a book.

2. You know, he read me like a book.

3. I can read you like a book.

4. And even growing up, because of that, I can read people like a book.