The pulse has him occupied enough that he makes no attempt to prevent the notebook from being yanked from his hands. They both fall limp at his sides; he's seen enough of the book to know the gist of the contents, and it's not new to him, but it was information that Cesar had denied. It had actually driven a very real wedge between them, causing L to pull away from the topic then. Had he been wrong to allow Cesar his denial?

"I'd ask what that's doing here, and why you didn't tell me you knew..." he says softly, stirring his coffee numbly with a teaspoon. "But I get the feeling this is the first time you've seen it, too."

Time to process is probably in order; L is silent, doing his best to give it to him.