I've been a huge fan of Sparth's work for years and have awaited the arrival of this book for almost as long. Sparth's work is warm and highly creative and his influence over a generation of digital fantasy artists is only beginning to be seen as his style is frequently imitated. It's certainly a great book and a must-own, especially for a concept art book at this price.
My only disappointment is is the format size (which is why I still give this 5 stars, as I don't think this is the fault of the artist). These works deserve a much larger format than the medium/smallish 9 x 9 inches. Also, and this probably has more to do with who owns the image licenses than anything, there is a bit of "sameness", a slight lack of variety, about some of the work that's not apparent when viewing his website.
Still, a great book by any standard and an essential addition to any fantasy/sci-fi/art lover's book collection.