Of course, the book market suffers from being saturated by piffle and filth, but has this not always been the case?
Despite the best efforts of the Gowers family, the towers of piffle have continued to climb ever higher.
1847, of unknown origin, perhaps an alteration of trifle, by influence of piddle, etc. Or perhaps imitative of a puff of air, with a diminutive suffix. As a noun by 1890.