Teddy Roosevelt and the Treasure of Ursa Major

Imagine if you lived in the White House! The first book centers around three of Theodore Roosevelt's children, Kermit, Ethel and Archie. Their mother is away and they are left in the charge of a comical nanny named Mrs. Duffit and their President father, who is very preoccupied with the visit from a quirky Russian Ambassador, Count Cassini. Eager to keep the children out of trouble, President Roosevelt sends his children on a treasure hunt--just like Treasure Island, only in the White House...