A Lua de Papel

Blurb

The Paper Moon is a 2005 novel by Andrea Camilleri, translated into English in 2008 by Stephen Sartarelli. It is the ninth novel in the internationally popular Inspector Montalbano series.
Montalbano nostalgically recalls his boyhood and the memories of his family, remembering episodes that stayed imprinted in his imagination, like when his father pulled his leg by stating that the Moon was made of paper and he faithfully believed him. He now starts to feel his age, worried that he's getting old and has not loved enough, especially those closest to him and now disappeared — a fact too late to remedy by showing his full love now, since they are no more.
Follows the narration of Montalbano's inner crisis and his depression about oncoming oldage, which seems to be afflicting him in mind and body. He meditates about death and the problems of growing old, with all its respective little impairments. So he decides that the best way to get out of these bouts of melancholy is to dive head first into a new investigation. The opportunity is presented by a beautiful woman, who comes to the police station in order to advise her brother's disappearance.