Pack lightly and carry the best travel guides going: ACCESS. Arranged by neighborhood and featuring color-coded entire keyed to easy-to-read maps, ACCESS guides are designed to help you explore a neighborhood or an entire city in depth. You'll never get lost with an ACCESS guide in hand, but you may well be lost without one. So whether you are visting Miami or Montreal, you'll need a sturdy pair of walking shoes and plenty of ACCESS.
The most useful guidebook for our recent vacation to Florence and Venice. I really appreciated having everything for a given section of each city all on one map. For example, the map of the Dorsoduro Sestiere lists museums, restaurants, shops, churches, etc with numerical indicators, and provides comprehensive and useful write-ups of each in the following pages. I preferred this to other guides where there was a separate map for restaurants, one for hotels, one for museums, etc. Also, the restaurants recommended were all very good!