I have no book, or sketches to share with you, but I want you to notice this project:
Do you know about it? It looks wonderful. Based on your portfolio, they may accept you as an illustrator for iPad, iPhone e-books. You can choose a story/novel to illustrate and work as fast as you want. In the end, they will publish it and you'll get 50% of the income.
As soon as I'll have time, I will send them my portfolio. Im sure some books with your illustration would be cool too ;)