Splendor by Anna Godbersen

As spring turns into summer, Elizabeth relishes her new role as a young wife, while her sister, Diana, searches for adventure abroad. But when a surprising clue about their father’s death comes to light, the Holland girls wonder at what cost a life of splendor comes.

Carolina Broad, society’s newest darling fans a flame from her past, oblivious to how it might burn her future. Penelope Schoonmaker is finally Manhattan royalty—but when a real prince visits the city, she covets a title that comes with a crown. Her husband, Henry, bravely went to war, only to discover that his father’s rule extends well beyond New York’s shores and that fighting for love may prove a losing battle.