A pricing battle lost by Amazon.com Inc. to a top book publisher has stoked fears that its hold on the nascent market of electronic books may be more shaky than previously thought. On Sunday, Amazon alerted customers that it had bowed to pressure from publisher Macmillan Publishers Ltd., which insisted on charging US$12.99 to US$14.99 for its books sold at the Kindle e-reader bookstore, rather than Amazon's standard US$9.99.
