This is a Japanese-language illustration (art) book.
"The Sky" is divided into three hardcover volumes, each printed on high-quality stock. Volume 1 (146 pages) contains Amano's work for Final Fantasy I-III, volume 2 (278 pages) contains his contributions for Final Fantasy IV-VI, and volume 3 (158 pages) features art for Final Fantasy VII-X.
The fourth book in the boxed set, "All About Yoshitaka Amano," is a smaller softcover. Its 128 pages include an interview with Amano, information about his work, a bibliography, and a visual index of each illustration that appears in the three "Sky" hardcovers.
Completing the set are an illustrated plastic sheet, two postcards, and a 96-page "The Sky" Premium Flipbook that lets you see two examples of Amano's art in motion.
All fit snugly inside the hinged "The Sky" box (similar to a laser disc set box), which in turn comes in a sturdy cardboard carrying case with built-in handle. Almost all of the language content is in Japanese.
A breathtakingly set, both in content and presentation!