[semafour]

For an authoritative source, you might try "Caring for your Baby and Young Child: Birth to Age 5", by the American Academy of Pediatrics.

https://www.amazon.com/Caring-Your-Baby-Young-Child/dp/05533...

[dragonwriter]

It's authoritative though less than comprehensive, and more (though, unless I'm conflating it with something else, not entirely) focussed on physical health.

But, yes, I absolutely do think it's a good one.