Doubleday announced in April that Brown's first novel since "The Da Vinci Code" was coming out Sept. 15, but had hesitated to say when the e-book would be released, leading to speculation that the publisher was concerned that digital sales, a quickly rising market, would cut into purchases of the more expensive hardcover.
But in a statement released Thursday, Doubleday spokeswoman Suzanne Herz said the e-book also would be available on Sept. 15 and cited concerns not about sales, but about "security and logistical issues," since resolved.
The book has an announced first printing of 5 million copies and is under embargo until its publication date.
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