The Art And Flair Of Mary Blair: An Appreciation. By John Canemaker. Disney Editions, 2003. 128pp, 10.3 x 9.7 x 0.7 inches (hardcover).
"The stylishness and vibrant color of Disney films in the early 1940s through mid-1950s came primarily from artist Mary Blair. In her prime, she was an amazingly prolific American artist who enlivened and influenced the not-so-small worlds of film, print, theme parks, architectural decor, and advertising. At its core, her art represented joyful creativity and communicated pure pleasure to the viewer. Her exuberant fantasies brimmed with beauty, charm, and wit, melding a child's fresh eye with adult experience. [...] Emulated by many, she remains inimitable: a dazzling sorceress of design and color."
Found via Book By Its Cover - most definitely go there for more! (To buy go here for example.)