Marketing Expert Penny Sansevieri has a number of very useful and informative posts on Huffington Post. Some of her most recent that will help any book campaign include:
The Secret to Finding the Right Social Media Site for Your Book
Getting Influencers to Notice You
Why Marketing Metrics Don’t Always Matter
The Key to Selling More Books: Book Optimization Simplified
Penny has been posting since 2009. Check out her more recent stories if you want to sell more books!