The High Peaks by Richard DuMais (1981)

Iconic 1980s guide to rock and ice climbing in RMNP. First edition printing with the Columbine on the cover (2nd edition does not have the flower on the cover).

This book was famous for being inaccurate with pitch and route descriptions, even when contemporary. Apparently it mis-describes the traverse pitch on the Casual Route which led to at least one accident that I know of. So don't use it as your only source of beta to climb the Casual Route.

It has a nice style to it, however.

214 pages, describing 282 routes. Includes black-and-white photos with route lines drawn on top, and a few topographic maps.