Because young children disregard writing on the spine of a book, researchers chose to run a test on color preferences in books. In a library situation young children see most books from a spine-out angle; thus when allowed to select a book by themselves, the first characteristics noticed are size and color. This study is based on the hypothesis that children transfer their preference for a favorite color to book color preference, if the quality of color is emphasized. Children also relate colors to moods. The two colors that were preferred by at least half of the 41 children tested were red and purple. With all the color choices totalled, the preference order was purple, blue, red, orange, brown, green, black, and yellow. The findings indicate that sex does make a difference in determining color preference. There was not enough consistency between favorite color and book color preference to justify a strong connection between the two. (Author/MM)