This book was written for a one-semester introductory college course in planetary science. This book filled the need for a comprehensive treatment of planetary science at a level accessible to the non-science undergraduate, yet was sufficiently detailed and challenging to be useful to the advanced undergraduate as well. Forward by Carl Sagan. This textbook is in good condition with an intact spine and binding. There are some highlights and underlines throughout the textbook but nothing over the top.  Addison-Wesley Publishing Company - 1988