Here is the Cover of the book:

Inside these covers, on over 25% of the new books, there was this whole other book:

Inside Title Page.  It reads “The Saint Peter Gradual; The Chants of the Mass for Sundays, Solemnities, and Feasts; As Found in the Divine Worship: The Missal; Very Reverend Carl L. Reid, General Editor

The entire inside of the book looked like this, page after page!