Monday with a mad genius /
by Mary Pope Osborne ; illustrated by Sal Murdocca.
- 1st ed.
- New York : Random House, c2007.
- 110 p. : ill. ; 22 cm.
- Magic tree house ; #38 .
"A Merlin Mission." "A Stepping Stone book."
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.