In what is apparently an effort to correct the glitch that caused the wild discounting of graphic novels on Amazon.com, the online retailer has been forced to remove the buy buttons from all comics publishers distributed by Diamond Comics Distributors. Right now, graphic novels from Marvel, IDW, Dark Horse, Archaia, Image Comics, Top Shelf and others—comics publishers distributed by Diamond—cannot be purchased on Amazon.com except through resellers.
While neither Amazon nor Diamond has commented officially on the situation, there has been speculation that the glitch was caused by Diamond. The current development seems to confirm it.
Full story at Publisher's Weekly