We have learnt about NextBigBook which is an Internet tool to measure the on-line and off-line success of books and their authors. You will be able to correlate the on-line and off-line analytics.

Measure success of books on-line with Next Big Book

Source: http://smallbusiness.foxbusiness.com/starting-a-business/2014/06/09/startup-offers-social-data-solutions-to-book-publishers/