Pokemon: World of Sinnoh was written by Simcha Whitehill, and was published in 2008. The main focus of the book is episode synopses for the 51 episodes of Pokemon: Diamond and Pearl, and it also includes some supplemental material as well. The book opens with a page talking about what will be found inside: The Sagas of Sinnoh, Roundup of the Regional Pokemon, Cast of Characters, Travel Tips, Rivals in the Region, and Expert Extras.

Then, the book goes right into the synopses of the first episode of Pokemon: Diamond and Pearl. At the top of each page, you will see what episode number it is, the title of the episode, and in what location the episode took place in. Each entry has at least one screenshot from the episode being talked about. Most of the entries include a "travel tip" (which is usually a tidbit of information about the location that the episode takes place in), as well as the stats and information for a Pokemon that is integral to the story.

In the book, you will find this information for the following Pokemon: Piplup, Carnivine, Elekid, Budew, Turtwig, Croagunk, Buneary, Shinx, Misdreavus, Glameow, Starly, Bonsly, Cranidos, Onix, Rampardos, Pachirisu, Drapion, Magikarp, Aipom, Steelix, Raichu, Roserade, Prinplup, Alakazam, Burmy, Combee, Vespiquen, Buizel, Bronzong, Stunky, Cherubi, Happiny, Mantyke, Garchomp, Shellos, Mismagius, Hippopotas, Shieldon, Staravia, Abra, Kricketune, Chimchar, and Torterra.

Sprinkled in between the pages of episode synopses are pages with additional trivia information. The first of these pages is the new motto for Team Rocket. Also, there are brief write-ups for the locations that Ash and his friends visit during Pokemon: Diamond and Pearl: Sandgem Town, Jubilife City, Oreburgh City, Floaroma Town, Eterna City, and Hearthome City.

After the episode synopses, there are various sections devoted to the human characters. First, it's the new friends made in the Sinnoh region: Dawn, Cheryl, Conway, Holly, Nando, Rhonda, and Zoey. Next, two gym leaders are featured (Gardenia and Roark). Then, there are advisors (Johanna and Professor Rowan) and inspirational heroes (Cynthia and Lucian). Then, there are the rivals (Kenny and Paul), and then Sinnoh's Most Wanted (Pokemon Hunter J, Goon, Jesse, James, and Meowth).

Team Rocket also gets a section featuring the various disguises they donned during Pokemon: Diamond and Pearl. The book then goes into the following information: special places to spot Pokemon, cool places to go in Sinnoh, the top five battles in Sinnoh, and new Pokemon pals.

From the design and tone of voice used in the book, it's obvious the author intended to write this book for a young audience. However, this is a good reference book, for anyone young or old, who wants information about the episodes and Pokemon of Pokemon: Diamond and Pearl.

I wrote this review after reading a copy of this book that my son checked out through the King County Library System.