And the winner is ... A Sudden Light: a Novel by Garth Stein (Published by Simon & Schuster)
From the LibraryReads announcement:
"Garth Stein has given us a masterpiece. This beautiful story takes readers on a thrilling exploration of a family estate brimming with generations of riveting Riddell family ghosts and secrets. This is a true exploratory novel, taking readers through secret passageways, hidden rooms, and darkened corridors that engage all of the senses."
Whitney Gayle, James Blackstone Memorial Library, Branford, CT