Unfortunately I doubt it. If they are just printing on-demand low-quality books it seems they’d not be badly hurt as their variable costs are cheap paper and cheap ink.

If you could find a book that broke their machine, sort of a Legends of Stuxnet, then you’d get somewhere.

Or if you figured out their business and determined if they sold so many they placed a bulk order for a printing, then place that many orders, they place the bulk order, you stop buying, and then do the mass return.