The Secret Kingdom is less of a bedtime story, as it is marketed, and more of a book with the ability to inspire the interested, or either bore or frighten the uninterested. I enjoyed the flow of the poetry, and the related images were interesting and unique. Not a story or narrative, rather a book to display artwork with matching poetry that focuses on the power of dreams, art, and words.
I do no think this is a book for the typical picturebook, or even older picturebook crowd. The Secret Kingdom is a book best suited for those already with an interested in creating art, poetry, any kind or creative endeavor used to capture dreams and share them with others. From the descriptions I read, I expected more of a story or letter to young artists than I found in the pages, but it might find a special place in the collections of artists of all ages.