We really like Dr. T. Berry Brazelton's Touchpoints books; they present research findings and what Brazelton looks for in child development in a very approachable, useful way.
Now it turns out Brazelton ["and his colleague Dr. Josh Sparrow," gotta plan for brand continuity, you know] have been answering parents' questions on the NY Times' website this week. Tuesday was discipline, Wednesday was food, and Thursday is sleep and toilet training.
Good stuff. Though frankly, it's nothing The Selecter didn't tell us 28 years ago.