The themes of the novel are: • The invincibility and optimism of youth juxtaposed with the fallibility and potential gloom of middle age • Each generation replicating the paths that previous ones have taken • The clock is ticking, so make the most of life The focal point of the action is the 50th birthday of the main protagonist (Marcus), which he is marking by having a holiday with his extended family. It also coincides with the 21st birthday of his daughter (Johanna).