Caught / Margaret Peterson Haddix / 343 pages

This is the fifth book in the Missing Series.  This time Jonah and his sister Kathleen journey back to the early 1900's and come face to face with Albert Einstein.  They were surprised that their task this time was to return Einstein's daughter (their friend Emily) to History.  They hadn't known Einstein even had a daughter.  They thought he only had sons.  He did, in fact, have a daughter, Leiserl, who was presumed to have died of Scarlet Fever as an infant.  Einstein's wife Mileva interferes with the mission but her interference bodes well for the future.