It’s available on the Internet Archive if you have access. It’s been a bit spotty for the last couple weeks, but they’re coming back online

https://archive.org/details/deen-of-deception-by-apostate-imam

If you can’t find the book locally because it’s being actively censored, or it’s dangerous for you to be associated with it, I would strongly recommend you use a VPN or something to protect yourself when you download