This is a novel about Cuba. Indeed, Cuba might be said to be the main character. Padura's characters are the same age as him, approaching 40 in the 1990s, "a faceless, aimless, gutless generation."
It is a detective novel of the hard-boiled school, and reviewers have compared the style to Raymond Chandler's; but Chandler was never so crude. In Carofiglio's The Past is a Foreign Country (which I read shortly before this) there was a character who "liked to swear. He probably thought it made him sound virile ... The effect was quite the opposite, but he would never know." I'm afraid the central character's language reminded me of this comment. This may have been at least partly because of the translation, which was stilted in parts and contained some strange figures of speech.
Since the book is about Cuba, we have cigars, food, some music, rum and cheap wine, drinking and hangovers. The story concerns the disappearance of a businessman (actually, someone in a Government ministry, since this is Cuba). The disappeared man (Rafael), his wife, and Conde the detective all grew up together. Rafael disappears and the questioning of those who knew him - which takes up the bulk of the narrative - tells his story, illustrating different facets of him and of Cuba's recent history.
Interesting on Cuba, but not a great crime novel.