class book
/ˈklɑːs bʊk/ /ˈklas bʊk/noun
1A book containing the register of membership of a Methodist class. Now chiefly historical.
2A book used in class by a teacher; = schoolbook.
3 US. An annually published album containing a short biography, photograph, etc., of each student in the graduating class of a high school or college.
Origin
Mid 18th century (in an earlier sense). From class + book.