If I pay for a book could I download it

As the title says, I think it would be nice if after making a purchase for a novel I could download the pdf/epub, Novelight is my favorite website and it hurts my heart to think of it ever getting shutdown like other websites but I don't know that it isn't possible and to lose all my coins with all my chapters that's I purchased would be too cruel for me. Please is it possible to add this feature