History Keepers by Damian Dibbens
Jake Djones, son of two normal parents with a business for bathtubs and such, is kidnapped after school and brought to a mysterious secret door in a building he loved since childhood. Where he is told that his parents, in fact, have nothing to do with bathtubs, but are time travellers – and lost in time. When the ship of the “History Keepers” organisation brings him and his aunt to a mysterious island, he realises that his parents might still be alive… With the help of the good looking Nate, the even better looking Topaz, Charly and his bird he travels to the Italy of another time… and discovers an evil plot...
Circus Maximus, Nightship to China