The Magic Treehouse

Caleb: "Mia, if you liked the Magic Treehouse book about DaVinci, you should get the one about Mark Newton."
Russ:"Mark Twain?"
Me: "Isaac Newton?"
Caleb: "No! The one Grandma likes."
Hannah: "Chuck Norris?"
Caleb: "No-- the guy from Russia..."


Oh. Rasputin. 
Of course.