Online or In-Store, We’ve Got You Covered. Zoom Back Left Right Up Down Only McMillan’s study guides are carried in more than 100 Exchange stores on bases worldwide. Since 1993, we have been your go-to source for AFH 1 and CDC products, no matter where you’re stationed across the globe.Buy our guides at a discount from your base store or order direct from our online store. Every order ships from our headquarters in sunny San Luis Obispo, CA — the happiest city in America.Don’t see your base on the map? Ask a store manager to order our guides today!