This book is essentially the same as The Sneaky Chef. For convenience I'll repost that review here.

While substituting unhealthy ingredients for healthy ones in a recipe is a good idea, this is really not the way to get your family eating better.

First of all, veggies that have been cooked, pureed and then cooked again in a baked item have lost most of their nutritional value. The amounts called for in these recipes are so small to begin with as to make the whole time consuming process pointless.

Secondly, the key to helping children make good food choices is teaching them to always try a little bit of everything. Over time, they learn that trying new foods is fun and develop a wider palate. How will they learn to like healthy food if it is always "snuck" into meals and is unrecognizable? The whole idea of some foods needing to be disguised just reinforces the idea that those foods can't possibly be tasty.

Steer clear of this gimmick. Show your kids by example that eating a variety of healthy food is enjoyable.