The 19th-centry English illustrator Walter Crane
(15 August 1845 – 14 March 1915) was one of the first artists to produce illustrations for full-color "toy books".
"The book is a structure," he emphasized the importance of designing book.
"This beautiful house is a structure of lines and colors," Crane often compared books to buildings.
He was particular about the design of entire page, and the illustration artist's arm was not one illustration, but the spread page itself as well as the book itself. Think of it as an architect who designed a house, considering the overall balance of the two-page spread by the power of design.
Crane was concerned with the formative beauty and decorative nature which the document originally had. That beautify the page, cooperation and harmonious collaboration of harmony in the perfection of the illustrator decorator what is was thought to produce a beautiful book.