The CIA forces twelve-year-old Charlotte "Charlie" Thorne, a rebellious genius, to use her code-breaking skills on an epic global chase to locate Einstein's last equation before dangerous agents discover it and unlock the solution to harnessing energy.

"Eva Traube Abrams, a semi-retired librarian in Florida, is shelving books one morning when her eyes lock on a photograph in a magazine lying open nearby. She freezes; it's an image of a book she hasn't seen in sixty-five years -- a book she recognizes as The Book of Lost Names. The accompanying article discusses the looting of libraries by the Nazis across Europe during World War II -- an experience Eva remembers well -- and the search to reunite...