What are the secrets?

What do Gywneth Paltrow, Stephen King, and Reese Witherspoon have in common? They are all big fans of the newest thriller dominating bestseller lists, Paula Hawkins’s The Girl on the Train...
There are thousands upon thousands of books published every year, and when a debut novel like The Girl on the Train breaks through, it’s always interesting to try to figure out why.
The thriller has dominated The New York Times bestseller list for nearly four months since its release. According to Riverhead, the book’s U.S. publisher, it recently passed 1.5 million copies sold, which might just make it the fastest selling hardcover adult novel ever...
What was most interesting was the power of Goodreads, the “social cataloging website” owned by Amazon.