The case of the missing moonstone

Lady Ada Byron, age 11, is a genius. Isolated, awkward and socially inept - but a genius. Mary Godwin, age 14, is a romantic. Adventurous, astute, and kind, Mary is to become Ada's first true friend. And together, the girls conspire to form the Wollstonecraft Detective Agency - a secret constabulary for the apprehension of clever criminals. Their first case involves a stolen heirloom, a false confession, and an array of fishy suspects - but these are no match for the deductive powers and bold hearts of Ada and Mary.