Here are some good resources to help parents develop their parenting skills:

Partnership Parenting: How Men and Women Parent Differently–Why It Helps Your Kids and Can
Strengthen Your Marriage, by Kyle Pruett MD and Marsha Pruett PhD
Fatherneed: Why Father Care is as Essential as Mother Care for Your Child, by Kyle Pruett

Parenting Wisely. The online one is an interactive parenting education program. Go to this website:

A general book is “Parenting From the Inside Out.” Parenting from the Inside Out (9781585422098): Daniel Spiegel › …

Emotional Life of the Toddler by Alicia F. Lieberman is still a timely book about this parenting this stage of development.