One woman's split-second decision on the eve of World War II will tear a family apart...

On the island of Guernsey, as WWII looms, many islanders make the heartbreaking choice to ship their children to safety in England, not knowing when (or if) they will be reunited. Acting on faith, Ava and Joseph Simon reluctantly send their 9-year-old son Henry and four-year-old daughter Catherine with their children's teacher Helen, who will escort them to the mainland.

But Helen's sister Lily is fleeing an abusive, childless marriage, and, just as the ferry is about to leave, she convinces her sister to let her take Helen's place so that she can make a new start for herself. It is Lily who takes the children to England, and it is Lily who lets Henry get on a train by himself. But Lily has always wanted a child, and she's unable to let Catherine go. So she decides to walk the other way, taking Catherine with her in her arms. That split-second decision impacts the lives of everyone long after the war ends.

Perfect for readers of Sold on a Monday, For Those Who Are Lost is at once heartbreaking, thought-provoking, and uplifting.