Jonah and Katherine come face to face with Albert Einstein in the fifth book of the New York Times bestselling The Missing series.

Jonah and Katherine are accustomed to traveling through time, but when learn they next have to return Albert Einstein's daughter to history, they think it's a joke--they've only heard of his sons. But it turns out that Albert Einstein really did have a daughter, Lieserl, whose 1902 birth and subsequent disappearance was shrouded in mystery. Lieserl was presumed to have died of scarlet fever as an infant. But when Jonah and Katherine return to the...

Jonah's new twin must time travel and face off against his siblings' worst enemy in order to save the future--and his family--in the eighth and final book of the New York Times bestselling The Missing series, which Kirkus Reviews calls "plenty of fun and great for history teachers as well."

After traveling through history multiple times and finding out his original identity, Jonah thought he'd fixed everything. But some of his actions left unexpected consequences. His parents--and many other adults--are still stuck as teenagers. And now Jonah has a new sibling, an identical...