C.W.
I feel the need to respond as I've decided I'm not a fan of Deceptively Delicious. I picked it up looking for ideas to make meals more healthy when my son was about the same age and actual amounts of food consumed seemed so sparse (not picky so much as just wanting to nibble...I wanted to make every bite count). I've glanced through Sneaky Chef as well. It's funny to me that these 2 books have become so incredibly popular, as the idea putting purreed fruits and vegetables into other dishes is by no means a new concept!
In general, there are some cute ideas in Deceptively Delicious, but I have a few more criticisms:
1) The recipies are just all a bit odd/off-tasting. And not just because they have some wacky purees, they just aren't that tasty. It was frustrating to go through all the effort of making or baking a whole batch something and have it just not taste good.
2) Some of the recipes call for an extremely small amount of puree. In my mind some of these quantities just don't justify the extra effort it takes to prepare them, nor can I imagine you add a ton of nutritional value per serving by their addition.
3) There are A TON of sweets featured in the book. Again, if you have a mind to make brownies from scratch and think to add some pureed spinach, why not. But on the other hand, I was slightly bothered by this focus on sweet treats for kids. Oh, we like our sweets over here, but I do not focus my already limited meal-making time on baking them. And I think that sneaking some veggies in a dessert may give the false impression that its going to make up for a child's lack of action at the table.
So here are some other suggestions.
1) My son's pediatrician at his 2yr. well visit helped me chill out on the eating with the following advice: Kids are just pickier at that age and the quantities they need are actually quite small. Your job is to offer a variety of healthy options - do the best you can, set a good example, and they will come around. Their bodies will know what they need and how much, but you never know when that will be (hopefully its not when you've handed your kid a bag of cheetos in a weak moment, ha!). And then think about consumption over A WEEKS TIME, as in "did my child have enough vegetables THIS WEEK." Also, the table can quickly become a power struggle - don't force anything, don't bribe, etc. It will save you a lot of aggravation. They won't go hungry.
2) Certainly I "coach" my son or make positive suggestions like "let's put your milk on a break for second and have a bite of peas together" etc. but I never fight him on it. Sometimes if a meal is really lacking, I'll offer fruit, yogurt, cheese, or a slice of toast w/peanut butter at the end, just to try to get him to have *something* to stick to his ribs (something easy...I DO NOT "short-order-cook").
2) Think about things your family already likes and how you can enhance, a la Deceptively Delicious. For example, do baked sweet potato fries instead of regular potatoes. Add extra veggies to spaghetti sauce, put flaxseed meal into smoothies, etc. You don't need to buy a special cookbook, just get a little bit more creative with your favorites.
3) I've found some really great kid-friendly ideas and advice for the picky eater in Parents and/or Wondertime Magazines. Each issue always has 4-5 recipies that sound great and are generally much easier than the recipies from Deceptively Delicious.
Good luck!