read someone like a book

read (one) like a book

To easily analyze and thoroughly understand one, especially one's emotions, motivations, etc. You won't be a very successful thief with that nervous demeanor—the cops will read you like a book. I can read you like a book, and I can tell that something's wrong, so please tell me what it is.
See also: book, like, read

read someone like a book

If you can read someone like a book, you find it easy to know what they are thinking. Very clever of them, that bit. They must have read me like a book. There are a number of books on the market which suggest that it is possible to learn to read a person like a book.
See also: book, like, read, someone

read someone like a book

be able to understand someone's thoughts and motives clearly or easily.
See also: book, like, read, someone