The unraveling of a large-scale Ponzi scheme and the unexplained disappearance of a woman from a ship at sea are interwoven in Emily St. John Mandel’s novel “The Glass Hotel.” The novel, which is set at a posh hotel on Vancouver Island, is a story of greed, remorse, and the search for purpose as its characters struggle with the fallout from their choices in a world full of unexpected beauty and unintended consequences.