Coca Cola has long been heralded as the pause that refreshes. Equally refreshing is the newly revised sixth edition of Summer's Guide to Coca Cola. Included are new chapters covering such things as Coke club collectibles and commemorative. There are 200 new photographs, and a look at 2007 prices on over 1,200 items. 'Coke needs no introduction, ' says author B. J. Summers. 'It's as American as both mom's apple pie and baseball.'