Book excerpt: In the late 1940s, Joe Simon and Jack Kirby ― creators of Captain America ― set the comics world on fire with the creation of a new genre that resulted in some of the best-selling American comic books of all time: the romance comics. The stories they created were exciting, innovative, and beautifully drawn, and remain a high point in both artists’ careers, even as Kirby went on to become the unrivaled King of Comics and co-creator (along with Stan Lee) of many of the most iconic characters in American history.