The Castle Tower Lighthouse — Patrick H.T. Doyle

On the day eccentric ex-adventurer, Edgar Font passes he wants to haunt a house as extraordinarily unique as he is. The hunt begins when his grandchildren, Audrey and Garrett visit over summer break. They explore an abandoned lighthouse only to find it full of puzzles, ghosts and mystery. To make it out unharmed they'll have to free the spirit of a young girl using everything they know and the lessons they learn along the way.