Publisher Hachette Book Group is no longer pursuing an acquisition of private publisher Perseus Books Group. In June Hachette said it planned to keep Perseus’ books business but would sell the client services unit to book distributor Ingram Content Group. A Hachette spokeswoman said, “Despite great effort from all three parties, they could not reach agreement on all of the issues necessary to close the transaction.” If the deal were successful it would have given Hachette leverage in a dispute with Amazon.com over e-book pricing.