I'm suspicious about whether this is legitimate or not, but, Catch-22 is free today on both Kindle US and Kobo US from publisher Horizon Ridge Publishing:
https://www.amazon.com/Catch-22-Jose...dp/B0D8GSJB54/
https://www.kobo.com/us/en/ebook/catch-22-28
Like I said, I strongly suspect this is an unauthorized eprint, given that the regular offering from
Simon & Schuster is still $12.99. But, grab while you can, I suppose.