What are some good books to read to a child to help them understand that they have two Dads?

I am entering my two year old daughters life for the first time soon and one thing I’ve always wanted was to read to my child. That coupled with me learning there are books that can help explain complex family dynamics has me very curious and excited if there are any that could help ease her understanding along.Any recommendations of this sort or even just really charming books to read to send her off to sleep would be great...EDIT: I am her biological father and her mother’s husband is her other dad via /r/Parenting https://ift.tt/2xK8x11