My Princess Boy by Cheryl Kilodavis

Dyson loves pink, sparkly things. Sometimes he wears dresses. Sometimes he wears jeans. He likes to wear his princess tiara, even when climbing trees. He's a Princess Boy. 

Inspired by the author's son, and by her own initial struggles to understand, this is a heart-warming book about unconditional love and one remarkable family. It is also a call for tolerance and an end to bullying and judgments. The world is a brighter place when we accept everyone for who they are.