Soft covered, spiral bound book titled Unified RulesINLAND WESTERN RIVERS GREAT LAKES STUDY GUIDE AND READY REFERENCE, Published by Houston Marine Consultants, Inc., 1981. This book contains both the complete text and a "plain English" translation of the Inland Rules of the Road ( Effective December 24, 1981). After you have studied the text and the photos carefully, you can check your knowledge with the review quizzes which follow each subject. You can also use the reverse pages of the photos as flash cards to practice identification of the lights and shapes displayed by different vessels. This book is in VG condition. Pages are clean and intact. A must have for your library!