Database System Concepts, by Abraham Silberschatz and Hank Korth, is a classic textbook on database system. It is often called the sailboat book. The First Edition of the book had on the cover number of sailboats labeled with various database models. The boats are sailing from a desert island toward a tropical island with the wind pushing the boats away preventing them from arriving at the tropical island. The book is currently in its Sixth Edition. The Third Edition added S. Sudrashan as an author.