Checked a little closer and found out they are a schismatic group. See the quote from their site
*“Our Lady of the Rosary Library attempts to provide literature for everyone, whether they be:
Non-Catholics searching for the Truth with a good heart and an open mind.
Traditional Catholics wishing to perfect themselves.
*Novus-Ordo Catholics wanting to come back to tradition. * Lukewarm Catholics needing something to rouse their fervor.” *
I am a bit of a conservative but I won’t ever associate myself with any group at odds with the Church and or our Holy Father. Based on that I will not use any of their material because they don’t provide an adequate witness for the Church.
God Bless