Earlier this month Nico Fassino of the Hand Missal Project published a series of articles on the revised liturgical books that were promulgated in 1964 and came into force in early 1965: that is, before the full revision of the Mass after Vatican II was complete. This may sound a niche area of research, and indeed those books were quickly overtaken by more radical revisions, but it is important for two reasons. First, Fassino’s research highlights popular reactions that surprised observers at the time and may surprise readers today; secondly, the “intermediate books” are sometimes presented today as a happy compromise between the Traditional Mass and the fully reformed Novus Ordo of 1969.