Music data start-up Next Big Sound has launched their second product, Next Big Book — promising to “analyze social, sales, and marketing signals to help you make smarter, braver decisions.” The “big data” service puts information from social networks as well as publicity triggers and author events together with public and private sales data into a single dashboard. The company has been working with Macmillan for the past eight months, and the NYT says the publisher will be giving both employees and authors access to the data dashboard “over the next few months.” Macmillan evp for digital publishing and strategic […]