"No, I could conjure books but they'd be way less convenient. Also the nature of the brain surgery is I have another little device in my brain, so in my case, I just materialized it where it needed to be; it only needs actual scalpels if you don't have a demon. However, it does rely on specific brain architecture enough that I don't think I should try giving either of you one like this because I do not know if you may have oddly shaped brains."

"We probably do, yes. --Can you conjure the Necronomicon?"

"Probably. That one of your books that's falling apart?"

Nod. "It's the most comprehensive one, and also the one with the most pieces missing. I still have unhealed wounds from when I broke into the Miskatonic University library trying to access the complete version--our version doesn't have the ritual to summon Hornets, we had just run out of cows, and I was desperate. If there's anything else in there that could help us--manage what we are--I don't know if we'll stop growing at eighteen like full humans but if we don't that's going to be a problem at some point no matter how many cows are available to eat--" 

"You guys aren't eighteen yet?"

"Fifteen. And a half." 

"Well. Yikes. - lemme finish this history thing and then I'll get a Necronomicon, I guess. Why's it called that?"

"I don't know. There's stuff in there that's dangerous, but it's not about death." 

"The title in the original Arabic is Kitab Al-Azif, I don't know if it's a literal translation." 

"No, that means 'the book of ignorance', that's weird."

"It was translated into Latin in the thirteenth century, maybe the translator had an overblown sense of the arbitrarily dramatic." 

"Perhaps. I wonder what else is different in the Arabic. Anyway, Civil War -" He proceeds through the rest of the slideshow.

The histories match as best either twin can determine. 

"Okay. Necronomicons." He makes two, an Arabic one for him and an English one for them.

Wilbur immediately sits down and begins leafing through it. 

Flip flip. "I'm Cam, by the way, I don't think I mentioned."

"Wilbur and Lucy Whately." 

"Charmed." What is in the intact book of ignorance?

Lots and lots of really disturbing information. 

The section Wilbur seems to be focusing on has a lot to say about Yog-Sothoth. Including instructions for a ritual that will summon him completely to this world and wipe out all life. Wilbur has skipped that and is intensely studying a set of pages that have more to do with his biological properties, insofar as a creature like Yog-Sothoth can be said to have a biology as humans would describe the field. 

"- have all the things you've tried from this worked as described?" wonders Cam.

"Until I got you instead of a Hornet. But since I'd successfully summoned Hornets before I suspect an error on my part." 

"Right, except that. There's a bit in here about resurrecting the dead."

He physically drops the book in shock. (It stops before it can hit the floor, caught by some invisible appendage.)

"What?" 

"It's page a hundred and four in my edition."

He takes the book back from his sister and flips hurriedly to page a hundred and four. "--That's missing from our old copy," he says.