L - Education (General)
LA - History of Education
LB - Theory & Practice of Education
LC - Social Aspects of Education
LD - Individual Institutions: United States
LE - Individual Institutions: American except United States
LF - Individual Institutions: Europe
LG - Individual Institutions: Africa, Asia, Oceania
LH - College and School Magazines and Papers
LJ - Student Fraternities and Societies in the United States
LT - Multi-Subject Textbooks
Cambridge Companions are a series of authoritative guides, written by leading experts, offering lively, accessible introductions to major writers, artists, philosophers, topics, and periods.