Several years ago, the idea arose to write a general book on tribology. Students often requested a suitable book for the study of tribology and there were problems in recommending any one text-book. Existing text-books were either too specialized or too literal. Many books provided exhaustive reviews of friction and wear data while others provided detailed description of the lubrication and wear problems occurring in machinery. A book which explains the concepts of tribology in terms useful to engineering students and engineers was, however, lacking
