A work in progress book design product.
A book split in two complementary halves, sold at half the price.
A way to try out more books, half a book at a time.
A way to carry around just the part of the story you are reading.
A way to make room to writers who would have
a hard time making it to the mass market,
because in a time of economic constraints,
people either buy mainstream best-sellers or nothing at all.