Ages 11–13

As the 1854 cholera epidemic surges, it’s up to Eel and his best friend, Florrie, to gather evidence to prove Dr. Snow’s theory about how the disease spreads—before the entire neighborhood is wiped out.

On a school trip to Florence, three American middle school students think they are in for a treat when a man who claims to be Leonardo da Vinci, brought back to life with a mission to better humankind, crashes their tour.

Ivan and Daphne accidentally let their younger cousin, Lila, in on their secret world of Lexicon. The three cousins must escape their own imprisonment before they reunite, provoke a revolution, and restore spring to the Land of Winter.

The secrets revealed in Mathemagic will have kids outwitting everyone with their superior computational skills, mystifying friends by plucking secret numbers from their minds and learning the mathematical secrets of the ancients.