Cribsheet: A Data-Driven Guide to Better, More Relaxed Parenting, from Birth to Preschool

Highly recommended. It's no "in my opinion" or "my grandma told me" nonsense you read elsewhere. This is evidence-based talk deeply grounded in science. Cheery on the cake, it's very well written, easy to digest, and very hard to put down once you start chewing through the pages.

Too much hay. Very minimal data and facts.