Atlas:

In 1928 a boy is found in Paris, moments from death, and taken in by a kindly family. Gentle, precocious, talented, he flourishes in his new home. But he refuses to speak a word about who he really is. As he grows up, falling in love and taking classes at the prestigious Conservatoire de Paris, he can almost forget the terrors of his past, or the promise he has vowed to keep. But across Europe an evil is rising, and no one's safety is certain. In his heart, he knows the time will come where he must flee once more. Eighty years later, the seven sisters are gathered together for the first time, on board the Titan to say a final goodbye to the enigmatic father they loved so dearly. To everyone's surprise, it is the missing sister who Pa Salt has entrusted with the clue to their pasts. But for every truth revealed, another question emerges. The sisters realize that their adored father was someone they barely knew – and that these long-buried secrets may still have consequences for them. Spanning a lifetime of love and loss, crossing borders and oceans, this volume draws the Seven Sisters series to its stunning, unforgettable conclusion.