Henry Carter Hull

When Leonard Fisher claims to be the long-lost heir to the Sminthsonian fortune, KC and Marshall set out to prove that he is a phony.

Seven-year-old Tessa and ten-year-old Cammie, the first female president's daughters, investigate when gold is discovered on the White House grounds and Tessa's piggy bank goes missing.

Cammie and Tessa Parks, daughters of the American president, assume the large gems on the dog collar sent as a gift from the leader of a foreign country must be fake, but when two of them go missing, they start to think maybe the diamonds are real and set out to find the thief.

When Dink, Josh, and Ruth Rose visit Washington, D.C., just before Christmas, they are inadvertently caught up in a kidnapping plot that was intended for the president's dog, but also involves the president's stepdaughter and her friend Marshall.

Mallory's journal of her fourth-grade trip to Washington, D.C., reveals how much fun she has, despite a loose tooth, being upset with her best friend, Mary Ann, and getting separated from her class in a museum.

Seven-year-old Tessa and ten-year-old Cameron daughters of the first female president, and owners of a very rambunctious dog, play detective when a baton belonging to the director of the Marine Band goes missing at the White House.