The first law of library science "books are for use" means that books in libraries are not meant to be shut away from people.
Firtst Law
The second law of library science "every reader his (or her) book" means that librarians serve a wide collection of patrons, acquire literature to fit a vast collection of needs, do not judge what specific patrons choose to read. Everyone has different tastes and differences & we should respect that.
Second Law
The third law of library science "every book its reader" means a library's books have a place in the library even if a smaller demographic might choose to read it.
Third Law
The fourth law of library science "save the time of the user" means that all patrons should be able to easily locate the material they desire quickly and efficiently.
Fourth Law
The fifth law of library science "the library is a growing organism" means that a library should be a continually changing organism. Books, methods, and the physical library should be updated over time.
Fifth Law