Duke took the book and flipped it open.

And did some staring.

And flipped the page and stared more. He leaned back into the couch, his food forgotten for the moment, as his eyes traced the lines of the ropes in the pictures.

"Holy shit," he said softly. "You can do this stuff."

It wasn't a question. He had no doubt at all with regard to Lucifer's abilities. His tone was almost pure awe. (The rest was horniness.)