Amazon just found a way to put further pressure on Hachette in its ongoing pricing war: strike a deal with another publisher. The online retailer has forged a new agreement with Simon & Schuster that will keep the book giant's digital and physical titles on Amazon for multiple years. The full terms of the deal aren't available, but the Wall Street Journal claims that it reaches a middle ground; Simon & Schuster will normally set prices, while Amazon will have the right to discount books in some situations. However it works, both sides are claiming it as a victory. Amazon argues that it gives the publisher a "financial incentive" to drop prices, while a letter from Simon & Schuster describes the pact as "economically advantageous" for both itself and authors.