The scent of lilacs

Siblings Katharine and Edwin Whittingham have just inherited a mansion from a great-uncle they never met. But before Edwin can sign the deed to Bryce House, his uncle's will requires him to spend one full month there, nights included. But the will failed to mention one thing. Bryce House is already inhabited--by a family of ghosts. Now practical Katharine must convince herself that the phantoms she sees are mere tricks of the light.