Saga Volume 1 by Brian K Vaughan and Fiona Staples

A sci-fi/fantasy about the people who inhabit a world and have wings, and their mortal enemies who inhabit their moon and have horns.  They’ve been at war for as long as anyone can remember, pitting science and magic in their fighting.  But having tired of the destruction of their own homes, it has become a proxy war waged throughout the universe.  One of the horned people is captured and held prisoner.  He lends a book to his female, winged guard and is broken out of jail as a result.  They escape and go on the lamb and have a child.  This is something both sides have always told their people is impossible.  As a result, professional assassins are hired to find them and kill them, except to bring the child back discreetly.  There’s a one-eyed novelist who writes the inciting book, there are mere-people who are reporters, trying to get the story published, there are bat-winged people trying to prevent this, a humanoid assassin who is in love with a spider woman assassin and who’s sister is also an assassin, a cat who can tell if someone is lying, a dog who sneezes sleeping darts, people who are part robot, a robot child, and the narrator, the offspring child that everyone wants to find.  Not safe for work – there are a lot of pornographic images in the artwork. (54 issues in this volume)