Английские идиомы о книгах

Closed book (for somebody) – что-то совершенно непонятное.
This topic is a closed book for me.
To read between the lines – читать между строк
It's difficult to deceive my mum. She always reads between the lines.
To be a bookworm – книжный червь (тот, кто много читает)
Her husband is a real bookworm.
To crack a book (informal) – открыть и начать читать книгу; заниматься
It's a perfect time to crack a book.
To have one’s nose in a book – сосредоточенно, внимательно читать