"You should make preparations to move at once: yourself, your family and your valuables.
I confess to a specific, strategic interest in the Malfoy family library. Not the nice, safe, superficial books that the Ministry knows about," he added with a knowing smirk.
"If I had free access to them to use in my research, that would be an immense advantage in the coming war.
I know that some volumes won't let themselves be touched by a non-Pureblood; some won't even let themselves be touched by a non-Malfoy. Naturally I would need full transcripts of those.
Surely it'd be better if they were safe at Hogwarts, rather than leaving them here for Riddle to find."