Blue Dahlia (In the Garden, Book 1) by Nora Robertsby Nora Roberts

From #1 New York Times bestselling author Nora Roberts comes the first novel in the new In the Garden trilogy. Against the backdrop of a house steeped in history and a thriving new gardening business, three women unearth the memories of the past and uncover a dangerous secret-finding in each other the courage to take chances and embrace the future.
 Stella has a passion for planning that keeps her from taking too many risks.