Jason, Rick, and Julia know that Kilmore Cove�s famous inventor, Peter Dedalus, holds the key to the mystery of the Doors to Time. It�s a secret so dangerous he could only conceal it in the past.
A trail of extraordinary clues and codes leads the kids to eighteenth-century Venice, where Dedalus�s inventions are scattered throughout the city. But the inventor seems to have melted into Venice�s world of masks and shadows. And Jason, Rick, and Julia are not the only ones trying to find him�
Praise for the Ulysses Moore series
�Full of action�paced like a Hollywood thriller�Recommended for students who have worn out their copies of Lemony Snicket�s books and [The] Spiderwick Chronicles.� � School Library Journal