Feasting on Asphalt, The River Run. By Alton Brown. Photos by Jean Claude Dhien. NY: Stewart, Tabori & Chang, 2008. 8vo. 208pp., maps, profusely illustrated, recipes, index. Hard pictorial bds., illustrated endpapers, generally Good to VG. Well-written stories from his expedition on motorcycle with crew scouting roadside eateries, the people and the geography along the Mississippi River from Louisiana to Minnesota.