The Assassination of Brangwain Spurge

Lots of creepy, scary, funny illustrations of monsters, strange creatures, gruesome food and art. A recently ended war between elves and goblins has far-reaching effects, with destroyed towns and monuments to the slain everywhere. A villainous narrator gets a finger gruesomely chopped off every time he delivers bad news to his villainous overlord. Protagonists Spurge and Werfel are in mortal danger thanks to a treacherous plot and face many perils, including bandits, mortal combat, gaping chasms, flying glass, explosions, armies.

Not really an issue, though one episode finds Brangwain escaping through a privy, with suitably gross illustrations.

Wine, ale, etc., including a creaky champagne fountain, are part of feasts.

Parents need to know that The Assassination of Brangwain Spurge, a tour-de-force collaboration between gothic storyteller M.T. Anderson and illustrator Eugene Yelchin, is the tale of an annoying, snooty little elf in a unitard (the title character) who's sent on a perilous peace mission (including quite a few perils he doesn't know about) to the kingdom of the goblins. Also of goblin Archivist Werfel, who gets the unhappy task of looking out for his ungrateful little guest, and a whole lot of treacherous plots in which they're both unwittingly involved. There's a lot of comically creepy violence, including grotesque illustrations and a character who keeps getting fingers chopped off every time the king's upset with him. Central to the story is the fact that in the wake of catastrophic wars, the elves and the goblins have very different versions of recent events and who did what to whom -- which are being carefully manipulated by those in power to launch new conflicts, murders, and more. There's also quite a bit about cultural differences, and how they can get you into trouble if you're not paying attention.