Amazon halts sales of JK Rowling's new novel, written under a pseudonym, as part of the guerilla warfare over e-book prices. Amazon Amazon is waging war against publisher Hachette over failed contract negotiations and has escalated its tactics as of Friday, according to the New York Times. Amazon has begun refusing orders and removing books sold by the publisher, telling customers that they are not available. JK Rowling's new novel, which is published by Hachette, The Silkworm, is no longer available through Amazon.