This book is so indispensable it is amazing that other guides are still being manufactured. On the inside covers are maps of the Metro system and the greater-Paris area RER (train) system, so you can peek in the book while you"re on the metro or train without looking like a confused tourist. The book itself has an index of all Paris streets and major buildings, which leads you to a section of maps broken down par arrondissement; (by district). The book is compact enough to fit in a small purse (and is sturdily bound so you can toss it in), but contains a wealth of information. To top it off, the color scheme is attractive and the typesetting is top-notch. This guide is the ultimate - it"s useful when you"re there, it"ll be beautiful on a bookshelf when you come home. If you buy a fold-out map or something other than this guide, you"ll regret it.