Comments about Books "Year Round Messier Marathon", Hardcover Book by Pennington:

this book will teach you how to star hop.don't need go-to with this book.one of my first books and now i can find anything on a star chart if its bright enough for my scopes magnitude level.harvard pennington passed away,but i'm sure glad i learned his system.geometric locating,it works.follow whats in the book,you won't be sorry to learn the old fashion way.don't need batteries.