Stealing Time — Anne Dublin

Thrown back in time by a mysterious pocket watch, Jonah and his stepbrother, Toby, are forced to overcome their differences and work together to return to the present. 

Jonah Wiley is having a tough time. First, his parents divorced, and now his mom is going to a conference and leaving him with his dad and stepmother.

But after Jonah steals an antique pocket watch, he and his stepbrother Toby are hurled back in time -- to Egypt, China, France, and other places around the world. In order to save themselves and get back to the present, Jonah and Toby must overcome their personal issues and work together to solve the tough problems they encounter.