"The Twilight Saga: The Official Illustrated Guide" fills in any gaps in the Twilight world.

“THE TWILIGHT SAGA: The Official Illustrated Guide,” by Stephenie Meyer, Little, Brown, $24.99, 543 pages

At the end of each book in Stephenie Meyer’s “Twilight” series, there were always were a few tiny questions. Like, did Gianna, the human working for the Volturi, become a vampire? How did Sam Uley persuade Emily Young to date him? What exactly was Victoria’s background?

The answers are in “The Twilight Saga: The Official Illustrated Guide.” Practically each character introduced in the series, whether human, vampire or werewolf, has their own story told in this 543-page almost encyclopedic book. Each of the international vampires introduced in “Breaking Dawn” has their background told coven by coven along with the family trees of the werewolves, showing how the wolf gene was passed down.

Meyer also includes basic characteristics about vampires and werewolves, background on the cars in the series as written by her brother, playlists, outtakes (some of which was previously available on her website) and a few frequently asked questions.

There is also a chapter-by-chapter summary for each book for those who either want a refresher or may not want to read all of the books, but still want a sense of the books.

A few other interesting details pop up, like what caused Harry Clearwater’s heart attack and therefore his death in “New Moon,” which put into motion several other events pivotal to the plot.

The characters and story lines in Meyer’s “Twilight” universe have more detail than what is initally seen in the books. The guide is well-organized with sections and characters easy to locate, and the addition of illustrations helps to give the reader a sense of how Meyer may have imagined them.

This guide may be more than what those of average interest in the series are looking for, but useful to those wanting a quick course in the series. For fans, it will be a welcome addition to their “Twilight” collection.

Email: rappleye@desnews.com