From Digital Book World, June 2014, while US trade publishing has grown significantly since 2006, the BPHs have gone stagnant except for the Fifty Shades spike:
http://www.digitalbookworld.com/2014...actually-make/
The chart (non inflation-adjusted, btw) says it all.
Mergers, price hikes, conspiracy, shifting consumers awsy from cheap mmpb to exoendibe trade paperbacks, with big lottery winner spikes, and still their combined numbers are flat.
Not. A . Healthy. Segment.