From Publishers Weekly (Google Ends eBook Agreement with Indies):
On Tuesday representatives of Google contacted the American Booksellers Association and Powell’s Books to announce that it will end its Google eBooks reseller program worldwide. In February, it had seemed as if independent booksellers were getting a reprieve when Google reinstated some affiliate stores that had low sales. But in yet another sign of industry consolidation, Google will start selling e-books solely through its recently launched Google Play beginning January 31, 2013.
Read more at Publishers Weekly.