These links are provided for your further study and enrichment. We have attempted to categorize them according to their content and purpose. Please understand that we cannot possibly know the doctrinal stance or the degree to which the providers of these websites are in communion with the Catholic Church. I am simply offering them as information and in no way do I promote or support dissent from the infallibly defined teachings of the magisterium of the Holy Catholic Church. Also note, where we have shown that you can buy a particular book: we do not necessarily recommend that particular retailer. We recommend that you shop around and find the retailer with the lowest price and best service.