Diana Gabaldon

1778: France declares war on Great Britain, the British army leaves Philadelphia, and George Washington’s troops leave Valley Forge in pursuit. At this moment, Jamie Fraser returns from a presumed watery grave to discover that his best friend has married his wife, his illegitimate son has discovered (to his horror) who his father really is, and his beloved nephew, Ian, wants to marry a Quaker. Meanwhile, Jamie’s wife, Claire Randall, and his sister, Jenny, are busy picking up the pieces.
 
The Frasers can only be thankful that their daughter Brianna and her family are safe in twentieth-century Scotland. Or not. In fact, Brianna is searching for her own son, who was kidnapped by a man determined to learn her family’s secrets. Her husband, Roger, has ventured into the past in search of the missing boy . . . never suspecting that the object of his quest has not left the present. Now, with Roger out of the way, the kidnapper can focus on his true target: Brianna herself.

Continuing the Outlander saga, readers follow Gabaldon's beloved characters through revolutionary Philadelphia. As Jamie makes a dramatic return to Claire's side, a new army sweeps the city, and romance and violence brew. Another enthralling novel of imagination, time travel and adventure in the riveting epic that began more than twenty years ago.