I have not yet watched "Wish" but I just got the book The Art of Wish and I absolutely love it.
First, there is a lot more text than in previous installments of "The Art of" series, and then there is the stunning concept artwork by Lisa Keene (who never ceases to stun me), Camille Andre, Griselda Sastrawinata-Lemay and many more immensely talented concept artists.
I hope the movie is as good as the art book.