|aThe secret at Jefferson's mansion / |cby Ron Roy ; illustrated by Timothy Bush.
|aNew York : |bRandom House, |cc2009.
|a87 p. : |bill., map ; |c20 cm.
|aCapital mysteries ; |v11
|aWhile visiting Thomas Jefferson's home, Monticello, presidential stepdaughter KC Corcoran and her friend Marshall investigate the theft of a box of toy horses given to Jefferson by his grandchildren.