I am not very attached to things so it is a big deal for a book to earn a spot on my shelf. These are books I keep to reference, lend to friends, and share with my kids someday.

Pregnancy & Parenting
Raising Freethinkers: A Practical Guide for Parenting Beyond Belief
Parenting Beyond Belief: On Raising Ethical Caring Kids Without Religion
Peaceful Parents, Happy Kids
Growing Up Global

Children's Chapter & Reference Books
The Giver (series)
What Do You Believe?
Maybe Yes, Maybe No
WondLa (series)

Picture Books & Read-Alouds
Whose Garden Is It?
The Boy Who Loved Words
Whoever You Are
Pete the Cat
Everything On It (and most everything else Shel Silverstein)
The Grannyman

Science, History & Poetry
The Magic of Reality
A Short History of Nearly Everything