Open-book synonyms

She was an open book to him and he was obsessed with the idea of reading it.

After all we've been through together the past few years, you should've been an open book.

Even this was not wholly satisfactory to Sarpi, who longed for the toleration of Protestant worship in Venice, and had hoped for a separation from Rome and the establishment of a Venetian free church by which the decrees of the council of Trent would have been rejected, and in which the Bible would have been an open book.

It was like reading an open book.

He found himself on the Caribbean Sanctuary, in the small chamber with the Oracle book.  Sea breeze swept through the small windows of the room, and he took a step towards the lectern on which the open book rested.  The pages displayed had a few words written on them rather than the constantly shifting writing that normally scrawled itself across the pages.  He felt himself compelled towards the book even as his fight-or-flight instinct reared up.