You took a book from the Prince's study and you kept it to yourself?

[ Predictably, Lambert sounds excoriating, but he can't fault the logic there. Revealing you'd taken an item from a fae enemy would possibly be a bad idea if the fae in question weren't already dead ... nonetheless, for once he's more interested in information than pissing on Foster (metaphorically) so he'll push that aside for now. ]

A book about these Pillars of Creation. Did it actually say anything else that helps us right now?