A generous priest from Chicago's St. John Cantius parish gave me a copy of this helpful booklet before I attended my first celebration of the Extraordinary Form of the Roman Rite, a.k.a., the Traditional Latin Mass or Tridentine Rite. Taking only 45 minutes or so to read, it was perfect preparation. The high quality photographs illustrate the ceremonies described in the text. The book doesn't just focus on the "what," but the "why." Readers learn the historical background of the Mass and the centrality of sacrifice in authentic Christian worship. Things likely to greet a visitor upon visiting a Catholic church -- tabernacles, stations of the cross, communion rails, etc. -- are given useful and reverent explanations. "For the Visitor at Mass" will not tell you everything there is to know about this ancient and once-again thriving form of worship, but it will help ensure that your first experience at Mass is a blessed one.