There's a sequel to 'Catch-22' called 'Closing Time'
Closing Time does this thing where it is somehow less complicated than Catch-22 but also harder to read.
The book is about the characters from the original, including Yossarian. Yossarian is 68 and living in Manhattan and has somehow managed to avoid facing consequences for desertion. He spends most of his time working for Milo Minderbinder, flirting with nurses, and complaining about getting old. The biting satire unique to Catch-22 is gone, to be replaced with lackluster absurdity and Slaughterhouse-5 in-jokes. There’s also this entire random bit where Yossarian stumbles across an actual, literal portal to hell under the Port Authority Bus Terminal, then embarks on a Dante-esque trek where he meets a bunch of dead writers. But that’s not even the main point of the story. The point of the story is that there really isn’t a point to the story, and getting old sucks, and that’s that.