Wish I could tell you but I am not crazy about her decorating style so I don't buy her books sorry................
I have Colette's Cakes, The Art of Cake Decorating and Cakes to Dream On. Both books are keepers. 
I checked out the Collette's cakes Art of Decorating at the library several times, It has alot of good basics and special instructions. I've seen an inspired cake (from this book) on CC, the cactus cake.
I would take a look at all of them. It really depends on what you like. Some of her older books are amazing, and there are still very trendy cakes in there.
You can "page" through most of them on amazon.com and get user reviews too! (Not to mention a better price, plus they have free shipping on orders over $25.00)
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