When I glanced at the back cover and saw the author was associated with UCSF, I smiled. UCSF has been such a great resources for pediatrics and education for us.
My aunt, who is a social worker who specializes in working with children, recommended this book. We are both fascinated with how kids think at such a young age, and this is a nice book for understanding child development. It's not entirely a parenting book; that is, it's less geared to telling parents what to do than it is to discussing research and theory, but if you're interested in a toddler's emotional development from a more academic and theoretical perspective, it's quite interesting and useful.
I had it on my nightstand, and Alex picked it up and read a few chapers too, so it definitely draws you in. There are also some chapters that discuss "shyness" and "slow to warm" to new situations kids, which mirror a discussion I had with our San Diego pediatrician. (I would be willing to bet our San Diego ped read this book based on her advice to me, when Anya was getting frightened at large birthday parties).
Anya, of course, fits in no category...she is at times the "active" child that the book discusses and at times "slow to warm," and one thing I dislike or find puzzling about the book, is that she doesn't acknowledge that kids may fall into multiple 'types' or labels. She seems to use her categories exclusively and notes that children who are shy will not be as physically active, which has not always been true in my experience. I find a lot of behavior is situational.
Interesting food for thought, at any rate.