I did some googling on the ISBN number. GameFAQs has this listed as:
Pokemon X & Pokemon Y: The Official Pokemon Strategy Guide [Hardcover] by Stephen Stratton (Author)
Hardcover: 256 pages
Publisher: Prima Games (Oct 12 2013)
Language: English
ISBN-10: 0804161992
ISBN-13: 978-0804161992
• A complete walkthrough of all the Gym Badges and through the Hall of Fame!
• Detailed information on all the new game features, from Sky Battles and Horde Encounters to Super Training and Pokémon-Amie!
• A guide to where to find hidden items, TMs and HMs, and special Pokémon—with a location index!
• Hints on the best ways to use Roller Skates, ride Pokémon, and challenge Gym Leaders!
• A super effective Pokémon screen cleaner to keep your Nintendo 3DS system looking sharp!
• Helpful tips and tricks for getting the most out of the PSS and online play!
• An updated type matchup chart that includes the all-new Fairy type!
• Pullout map to guide you through the Kalos region!
Some interesting things to note first about the book specifics:
Only one edition. There is no paperback or regular edition, nor is this one considered a collector's edition. It's a pocket-sized, hardcover guide with a dust jacket (think of the Animal Crossing: New Leaf guide, or the upcoming Mario & Luigi: Dream Team guide, but with a hardcover). Also, disregard the page count; 256 pages is a stock estimate page count Prima often uses when the final page count has not yet been determined.
It is slated for a day-and-date release with the game in North America. Many people were speculating that a guide may not be available until later, since our guides are direct translations of the Japanese guides, which are not released until the months following the game's release. We are getting the guide on day one because...
It is not being written or compiled by The Pokémon Company, Int'l. The team that has translated the official guides from Japanese to English and several European languages ever since Pokémon Emerald Version (and the only team to bring us guides since Pokémon Platinum Version) does not appear to be behind this guide. Instead, Stephen Stratton, longtime head author of Nintendo guides for Prima, is taking the helm. (His pedigree includes guides for Animal Crossing, New Super Mario Bros. and The Legend of Zelda.)
The new product description also confirms some aspects of the game (there will be a Hall of Fame), and gives us the first mention of the term...
Super Training. Listed in the same breath as the other new features (Sky Battles, Horde Encounters and Pokémon-Amie) is "Super Training." Could this be the new "more visible EV method" (referred to in another recent post as taking place at the "Tame Park")? When Pokémon-Amie was announced, a lot of people assumed that that was the new method, but Super Training sounds more appropriate.
Edit: I just checked Bowker and they have the same info as GameFAQs