This is a fun little collection of, well, two stories essentially: Duel 1 and Duel 2.
The first has the conceit of two kids drawing super-powered characters who take turns stomping the other kid’s most recent character. So we get a bit of one-upmanship with simple comic drawings of different types of characters.
The second actually features two comic artists swapping drawings, so each new creation attacks and defeats the champion from the previous turn.
The book also includes a couple prequel adventures of the characters before they met their ends in the duels, which is a nice treat of more straight forward comic bookery. The end matter of the book includes additional treatments of the characters.
It’s a bit of fun. I might get a copy of it for my boys for Christmas.