You are looking on one 5" by 7 3/2" 160 Page softcover copy of "MARS OBSERVER'S GUIDE"printed in2003.This item is in very good condition. All pages are clean and tight.Chapters include:Observing the red planet, mars as a planet, equipment basics, the view from earth, mars in 2003, mars in 2005, mars in 2007-8, early explorers,and much, much more. Thanks for Looking.A6***Powered by eCRATER