Let me first say I like this book and I am glad I purchased it. I echo other reviewers who question the idea of hiding foods instead of teaching your children to enjoy them. However, this is certainly a way to sneak some in while you are attempting the teaching.
My kids are not THAT picky, but they are children after all so of course they would prefer nothing but cookies for the rest of their lives.
I have made all the purees so far and have tried many of the recipes. I have also used the concept in my own recipes with great success.
Like other reviewers, I am also wondering how much nutrition is left in the food once you boil it down to nothing. In some cases, I have added the water I boiled the veggies in to recipes in other ways. Don't know if that helps anything, but it made me feel better about it.
Now for my disappointment about the book...the recipes don't have nutritional values listed. yes, there is a list of nutrients provided by the sneaked in foods, but no real nutrional value - ie calories, fat, fiber, etc. My next project will be to calculate nutritional value based on my old recipes versus adding the new recipes. I am not certain how much I am actually changing the value - in other words, am I doing a fair amount of work for little improvement? The sneaked in foods seem to be in such small amount sometimes I am just not sure that there is a real value in it. I guess something is better than nothing, but since my kids already eat fairly well, I am not convinced that it is worth all my extra effort.
I should say for the record that I have 4 children -infant, 2,4 and 13. The overall concept is not THAT much work, but I decided to go gung ho and made every puree over a couple of days - many tiny containers in my freezer now with 1/4 cup dollops of purees. Also, I have a managerial job where I work 50-60 hours weekly away from home. I cook meals ahead of time and leave them for stay-at-home husband to put in the oven. He is NOT in on the sneaking (just for fun). I have included my 13 year old in the plan b/c she is a very healthy and adventurous eater -so this is our little joke on the rest of the family. As I mentioned before, I have been able to incorporate the concepts into my own recipes and have had no problems so far. I usually cook large quantities in advance - ie 4 gallons of chili or meat sauce - then separate and freeze for quicker meals later. The purees figure quite well into that plan because I can whip up a batch and add the entire amount to my stock pot instead of measuring out these tiny amounts for later. AND I have not had any problems with my frozen dinners. I can tell no difference from before I began adding the purees.
My last concern about the book is that (much like me in this post) she spends almost the first half of the book going on and on about how great it is before ever starting to tell me what to do. Also, the recipes are certainly not difficult or gourmet quality, but they do require a little bit of cooking knowledge. Sometimes they act like I haven't a clue about the kitchen "makes about 1 cup of puree...double the recipe if you want more" (gee, never would have thought of that). Other times they can be a bit ambigous "makes 8 large muffins...scale quantities for smaller muffins" - well "large" turned out to mean the normal size muffins, not the larger muffins I had hoped (not a big deal, you just have to figure out what they mean).
Overall, useful book...gave me several ideas I had not thought of before. I have been able to use the recipes in the book as well as incorporate the concepts into my recipes. After several weeks and many recipes, we have had great success...no flops, and no one has suspected a thing.