The newest edition of
Mothering has a good list I think (I just ordered some from the article).
Ones that don't include children per se, but which I also like because breastfeeding is a part of what's discussed (probably a BIT old for your dd right now but not for long

) --
Winnie the Pooh's Encyclopedia of Animals -- I'm pretty anti-Disney in a lot of ways, but the books actually have good photographs (multiple ones) of animals, insects, birds, etc. -- reliable scientific information -- and best of all, for virtually every mammal it notes that when they are a baby, they "drink their mother's milk," even noting duration of nursing at some points - i.e., baby elephants nursing for 2 or 3 years (I forget which

). Ina loved looking at the pictures even when she was around 18 months, and as she's gotten older, we've read the books more in-depth. My six year old nephew loves them too, so there's some real longevity in the book too. (We have the Nature one too). The Animal one follows the creature from birth to "adulthood," so in some cases it shows caterpillar to butterfly, or tadpole to frog, or etc. I think it's pretty cool.
Moses the Kitten (James Herriott) - illustrated story of a vet finding a lost kitten, bringing it to the farm he thought it belonged at, and the farmer's wife putting the kitten in the pig barn with a sow who's just littered once it's "lapping milk," and instead, the kitten starts nursing on the sow. Pretty neat and Ina loves to point out the furry black kitten mixed in with the piglets, all nursing away. This book treats nursing as matter-of-fact. I grew up on a ranch and saw lambs, calves, foals, kittens, and puppies all nurse - I think a lot of kids miss out on that, and this book could help show them that actually all mammals nurse.
