To get back to the original question, as to what traditional Catholic books and web sites are recommended, I would encourage the original poster to keep in mind the following key issues:
First, there is a dangerous element within the traditionalist movement that can have a detrimental impact on your faith.
Some traditionalists are held in favor by the Holy See, some are not. For example, sedevecantists believe that the current Pope and bishops are promoting heresy, and reject the Pope outright. Conclavists go so far as to elect their own replacement for the Pope.
The main thread in common within the traditionalist movement is a general rejection of Vatican II. It goes to the very heart of the matter. Traditionalists, generally speaking, want to restore most (if not all) of the liturgical forms and teachings to the days before Vatican II.
I have read all of the claims that traditionalists don’t really reject Vatican II, but then they turn around and bash Vatican II at every turn. They speak out of both sides of their mouth.
What Tobinatorstark is trying to warn you, the original poster, is that there are web sites and traditionalist book stores that are detrimental to your faith, and that you need to exercise caution and due care in reading their material or being persuaded by their dangerous dogma.
There is a real danger that you will be influenced by their erroneous ways, and you need to be very, very careful.
Many traditionalists reject ecumenism, for example. Many reject the Pope as the ultimate authority of the Church. Many reject Vatican II. Some traditionalists actively promote hate speech - (Just Google Bishop Williamson of the SSPX to see what I am talking about).
Without naming names, Tobinatorstark raises a valid point. Beware. Be careful. Not all allegedly “traditional” web sites or supposedly “Catholic” bookstores teach the true faith.
I would be very leery of traditional Catholic web sites and bookstores that are not in full communion with the Pope and have the blessing of the official Catholic Church. Stand guard, beware.
The Priestly Fraternity of St. Peter and Paul (FSSP) has a bookstore at
fssp.com. I would stay away from the web sites, and purchase books from the FSSP direct. They are in full communion with the Holy See.