This in from Catherine Burr:
I initially wrote GOD LOVES ME and the cover was pink, I wasn’t aiming for girls, I just liked the cover and thought it fit. I wasn’t planning on doing a series for the God Loves Me books. I was just planning on writing one book, but when my sister saw the pink God Loves Me book, she immediately said I should write one for boys and have a blue cover, so I did! I loved the idea and both books became part of the God Loves Me series, they can be read individually or together, they can be interpreted as pink for girls and blue for boys, or not. The books are non-denominational but with a belief in God at its core.
The God Loves Me series are available as ebooks and print from major bookstores. Authored by Catherine Burr.