Splendid collection of scanned books
Don Paco of the Ite ad Thomam blog, has scanned hundreds of volumes for the Ite ad Thomam Out-of-Print Library. The amazing collection includes many text books would help you to earn that "Unreconstructed Ossified Manualist" mug: there are some real gems there. As well as the works of St Thomas, there is also Mansi's Sacrorum Conciliorum and the entire Dictionnaire de Théologie Catholique to give just a couple of examples.
The files come with a request for donations - $10 per file or $500 for the whole collection.