The Last One at the Wedding by Jason Rekulak

Frank Szatowski, estranged from his daughter, Maggie, gets a call inviting him to her wedding. Maggie is marrying artist, Aidan, son of wealthy businessman Errol Gardner. The wedding will be held at the Gardner estate in New Hampshire. As Frank gets to know Aidan and his family, he becomes more and more uneasy about the marriage, but his pleas to Maggie to reconsider fall on deaf ears. Even Frank's sister, Tammy, who accompanies him to New Hampshire, tells Frank to keep his feelings to himself, lest his relationship with Maggie becomes even more fractured. As two deaths circle around the Gardners, Frank cannot let his suspicions rest. The Last One at the Wedding is a page turner with humor, heart, and a great read-alike for Harlan Coben. I loved that I couldn't predict what was going to happen! It will be published in October.