Although Valentine and his two comrades might interrogate the desert, it remained dumb and indecipherable as a closed book.
He felt that in a case of this sort a girl's mind was a closed book to him.
Spunyarn had failed to catch the "tone," Latin verse was a closed book to him, but he stuck to athletics.
The girl sat with closed book, looking at his face as he slept.
Nature was to him a closed book, very likely for a purely physical reason.
But whatever his story might have been, it must ever be to me a closed book.
Dante was, of course, a closed book to him as to most of his contemporaries.
She had, for instance, a command of blandishments which to her elder were a closed book.
It seemed to be in the nature of a closed book with the child.
I tried to speak to him about the roughness of the investigators, but he is a closed book as to that.