Apple has rejected the US Justice Department's allegations that it colluded with publishers over electronic book pricing.
It said the charges were "simply not true."
The US government had sued Apple and five publishers, saying they conspired to fix the prices of electronic books.
It has reached a settlement with three of the publishers that could lead to cheaper e-books for consumers.
Apple spokesman Tom Neumayr confirmed the company's position to Reuters, which earlier appeared in a Wall Street Journal article.
"The launch of the iBookstore in 2010 fostered innovation and competition, breaking Amazon's monopolistic grip on the publishing industry," Apple spokeswoman Natalie Kerris told the Journal. Kerris defended the current pricing structure as parallel to Apple's mobile software store.
