Marco
**Besides from the good suggestions you got and will get, what you can do is do a web search for books LIKE the one you have published - then find out who was the publisher of that book(s) and you’ll know that they are looking to publish those kinds of books. **
The only problem there is that no one has written books like the one I have written.
I guess the bottom line is that most books of apologetics are by conservatives, rather than liberals. The liberals tend to defy traditional and authentic Church teachings rather than uphold and defend them. So you are right. Almost any publishing house for apologetics books might be the best bet, but I’ll look for the publishers first of all of writers like Peter Kreeft and others I admire.
Thanks for the suggestion.