My “Rick Steves Mediterranean Cruise Ports” guidebook is a perfect example of that old business axiom: “Find a need and fill it.” So many people take a cruise and have no practical information to help them use their time on shore smartly. Every Mediterranean cruise has the same rhythm: Sail each night and sightsee in a different port each day. With this 1,200-page guidebook, you’ll know exactly how to get the most out of your precious shore time. I’ve been on a Mediterranean cruise for the past