Lulu is running a short-term sale on all print books: 30% off if you use the code APRIL30, now through Sunday, April 12, 2015.

Here are some of CMAA's books offered through Lulu:
Evangelia Cantata: A notated book of gospels (regularly $69)
Chants of the Church
Communio with English Verses
Graduale Romanum 1961: volume 1, volume 2
Versus Psalmorum et Canticorum (Vulgate psalm verses for EF introits and communions, pointed according to the psalm tones)

and several other books listed in the CMAA catalog.