Tourism and vacation travel continue to evoke books on the temptations of particular scenic or historic locales. Sprague, a companionable cicerone, offers a choice of 800 spots to explore: the points at which the standard or four-wheel-drive automobile may cross the Rocky Mountains and the ranges which spur off from the Great ivide, from Horseshoe Lake Pass in northern New Mexico to the rugged face of western Canada 2,000 miles away. ""Manifest destiny"" comes to mind again and again as he tells of the explorers, trappers, gold-seekers, scientists, politicians, railroad-builders, and motorists who have traversed these passes in their varied quests. Sprague has set up a standard of altitude figures and name spellings, and has handily inpointed locations of passes in a system of six geographical groupings. He also gives data on drainage, terrain, timber, and other matters of interest to the traveler or student. A long Acknowledgments list signifies that he has tapped a great many sources of factual information and anecdotal curiosae. Out of it all, he has developed a handbook that deserves a place in the glove compartment of the family car next time its tank is full and its nose points West.