Catholic Publishers

Reading good Catholic books not only helps learn what God has revealed but can also help a person pray. Prayer, St Thomas Aquinas said, is simply: raising your mind to God. Reading Scripture or writings of the saints or other good teachers of the faith helps to quiet the mind (put everything else out of mind) and be absorbed in God -- i.e., helps raise the mind to God.

Although no publisher can be completely, guaranteed, these are some generally good and reliable Catholic publishers. Links provided.

If you are looking for something for home study for yourself or family/children, you might consider MTF's Didache Series.

Tan merged with St Benedict's press but they seem to still maintain their own line of books

This company has a variety of books but they are somewhat unique insofar as they also publish specifically liturgical books, such as the Roman Missal -- the book that is used for Mass