The most intriguing book yet in an outstanding series. The adventure surrounding one of history's brightest minds sparks an exploration deeper truths. Will appeal to young adventure lovers and readers who want more to think and talk about once the final page is turned. (Book Five in Missing Series) Jonah and Katherine are accustomed to traveling through time, but when they learn they have to return Albert Einstein's daughter to history, they think it's a jokeNthey've only heard of his sons. But it turns out that Einstein really did have a daughter, Lieserl, whose 1902 birth and subsequent disappearance was shrouded in mystery.