The best guide book for climbing Colorado 14ers is by Roach...multiple routes and descriptions with good maps. He and his spouse have a website: http://www.climb.mountains.com/

www.14ers.com is an excellent website that gives very detailed descriptions of the standard routes, even including photos from the trail that you can print out and take with you. It also has a good on-line community in the forums that is helpful and generally fun to read.