Lay your fabric on your book covered in foil. If you want to get it extra flat, you could tape the edges of the fabric down (although that would prevent the taped area from getting dyed, but might give you a nice border). Draw your design in glue using the glue straight from the bottle. Do not worry about the amount, you don't need to overdose on glue. Just know that whatever parts you glue will retain the original color of the fabric. When finished, let your design dry completely. If you have kids or pets, make sure it's out of reach.