In all my reading and research on homemade baby food, there are a few books that I continue to go back to as they were great references and motivators for me.
real food for mother and baby, by Nina Planck, is my absolute favorite. I just enjoyed her outlook as a whole. Actually, she never even made puree's for her baby. It's a great read and I highly recommend it. She very much follows the 'Go with your Gut' philosophy.
Nourishing Traditions is not a 'baby food' book per say, but is an excellent book overall for those looking to move to a more natural, whole foods diet and they have a nice little section regarding feeding babies.
Cooking for Baby is one I kept going back to, to reference their suggestions on ways to cook certain foods, and in general, see what they were suggesting per age range.
Organically Raised is the same as Cooking for Baby - great reference on cooking methods, ideas for what to feed when, and food pairings. This book also helps get you in the right mindset for cooking for your baby - you'll see what I mean if you read it!
And, I guess, with this book, I should note now that I am not 'Organic or Bust'! I grow apples for cryin' outloud - one of the worst foods on the Dirty Dozen list. I understand the bads about pesticides and, on the other hand, the need for them sometimes. My thought process is, if I am not feeding the skin [for produce], then organic isn't really neccessary. At the end of the day, anything homemade from real foods is hands down better than anything I can feed my baby out of a jar sitting on the self at a store.
Website that I have jumped back to frequently are: