This book has all you need to know about the game, Kingdom Hearts 358/2 days. Has all strategy, all panels, all character stats and an awesome fold out of the Organisation 13 in the end with their weapon list on it! The book itself is nicely presented, but if it had an index, and if some parts of the guide were sorted better (like the panel area) it would have been awesome.
If you are a guide collector, or simply want the guide to help you venture through Kingdom Hearts 358/2 days, I'd recommended to you, however 358/2 days is not a hard-to-follow game so you can complete it without too much trouble even without a guide.