Swimming Lessons

\'Gil Coleman looked down from the window and saw his dead wife standing on the pavement below.\'
Gil\'s wife, Ingrid has been missing, presumed drowned, for twelve years.
A possible sighting brings their children, Nan and Flora, home. Together they begin to confront the mystery of their mother. Is Ingrid dead? Or did she leave? And do the letters hidden within Gil\'s books hold the answer to the truth behind his marriage, a truth hidden from everyone including his own children?