Hello all! I am new and would like to publish a coloring book. Is it possible to have the images back to back? I have close to 100 pages ready to go, but hear it should be one sided. Really want pages back to back so I can fit as many in as I can. The book coincides with my children' books I have already self-published. I don't want to charge as much for the coloring book as I did for the illustrated books.