The night passes swiftly, and she wakes earlier than usual, giving her some extra time in the morning, if she wants to talk with anyone. Otherwise, she can settle in for a long day of studying various topics. She's still very unlikely to discover anything about creating a body for the succubus (DC 30 Know Arcana, with a +2 bonus from the library) though she might find a few clues she could bring to someone more skilled. (Only a DC 15, with the same +2 bonus, and she'll find some basics she could pass on to the succubus who did the fleshcrafting, as a place to start.)