Books like Atomic Robo: The Knights of the Golden Circle

At the end of the previous volume Atomic Robo was trapped in the Old West. Now he's laying low, whiling away the time until he catches up to the present. But when he jumps in to save an old man in trouble, he gets sucked into a bigger plot with a steampunk villain. Given the nature of this arc, I loved the little Easter Egg in the epilogue. (view spoiler)[Jim West and Artemis Gordon from The Wild, Wild West TV show (not the terrible movie) make an appearance. (hide spoiler)]