<em>"What If The Zebras Lost Their Stripes"</em> by John Reitano is a book that discusses the issue of racism and the innocence of children.
In the book, it is explained how children do not see each other differently because of skin color but rather would be excited that they look alike to someone else because they have the same type of hair or color of shoes.
In literature, an allusion is an "unexplained reference to something or someone outside of the text". The reference is usually to someone or something popular, like Mark Twain.