Suggested age ranges across editions span roughly 8–17 years. Specific listings include 8–12, 9–12, 10–14, and 10–17 years.
Page counts vary by edition, roughly from 160 pages (graphic novel editions) up to 624 pages (some paperback novel editions). Other listed editions include counts such as 512 and 586 pages.
The title is primarily categorized as juvenile (middle-grade/YA) fiction. Subgenres include fantasy, general juvenile fiction, and, for the graphic editions, comics & graphic novels.
Listings include English-language editions and at least one Spanish-language hardcover edition.
Dimensions vary by edition: heights about 7.5–9.4 inches, widths about 5.1–6.5 inches, depths about 0.55–1.7 inches. Listed weights range roughly from 0.8 to 1.75 pounds across editions.
