Tiffany Haddish has a new book deal with HarperCollins. She will create children's books It is a three-book deal. She will release three books within the next two years. One book slated for release is titled, Layla, the Last Black Unicorn. It is about about a unicorn who finds it difficult to fit in. In a statement Tiffany said, it's no secret that when I was growing up I had a lot of difficulties learning to read. Like many kids, more than anything I wanted to see myself in the books I read. There are many traditional kids books we grew up.