Jack and Annie travel 500 years back in time to Florence, Italy, and spend a day helping
Leonardo da Vinci in the hope of learning another secret of happiness.
— based on fandom.com
DEBUT
Monday with a Mad Genius (Random House, August 2007) [print ·
e-book].
VARIANTS
Debut. Monday with a Mad Genius (Random House, August 2007) [print · e-book].