I found the book very helpful regarding aspects that the the first part of the guide left out.

If you look in the previous guide for example, Mewtwo is mentioned that you have to trade it over from another Pokemon game, however in this one, it mentions that you can find it in Cerulean cave.
Another great feature with the book is the much expanded Pokedex, which tells you which TM's and HM's a pokemon can learn, which wasn't covered in the previous book. The book also includes the phone numbers of all the available trainers in the game and how to contact all 16 gymleaders for rematches. Having played Pokemon FireRed, I found the whole guide to the Kanto region interesting, even though I'd played through the region, in a different game, many times before.

This is absolutely the best pokedex ever, amazingly detailed file for each one of all 493 pokemons. I love it !

This is a great book for Pokemon fans. Contains heaps of information on all 493 Pokemon. Stats could be given in a more helpful format but overall it is an awesome book. As close as you'll get to a real Pokedex.