Contents: 1. Introduction. 2. Messages for book selection. 3. Lines of approach. 4. First law of library science and book selection. 5. Second law of library science and book selection. 6. Third law of library science and book selection. 7. Fourth law of library science and book selection. 8. Fifth law of library science and book selection. 9. Conflict of laws of library science. 10. Sources for book selection. 11. Routine of book selection. Index.