Family Upstairs by Lisa Jewell

From the #1 New York Times bestselling author of None of This Is True comes another page-turning look inside one family’s past as buried secrets threaten to come to light. Be careful who you let in. Soon after her twenty-fifth birthday, Libby Jones returns home from work to find the letter she’s been waiting for her entire life. She rips it open with one driving thought: I am finally going to know who I am. She soon learns not only the identity of her birth parents, but also that she is the sole inheritor of their abandoned mansion on the banks of the Thames in London’s fashion district.