A theory book is a book that deals with important topics for students or research professors in their respective fields. In the library of the Royal University of Law and Economics (RULE) is a collection of theory books, many of them university books, designed to teach the university curriculum. The theory book is provided by the lecturer for archival purposes and for research purposes, including law, public administration, economics, information technology and more. There are also a number of theory books in English and French. You can find the theory books in the library directly. For more information, contact the librarian, thank you.