It was like reading an open book.
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.
Portfolios can be of the open book type or look like a large zippered carry bag.
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.