Apple is looking to take its e-books case with the US Department of Justice (DOJ) to a full trial.
Reuters cited Apple attorneys in reporting that the company requested that a US District Court in Manhattan hold a trial to enable it prove its innocence in the price-fixing case.
The news agency quoted Apple attorney Daniel Floyd in telling that the court that Apple's executives "believe that this is not an appropriate case against us and we would like to validate that."
The request provides the strongest indication yet that Apple will not join a number of US publishers in settling the DOJ's claims.
The department alleged that Apple and its publishing partners are violating anti-trust laws in agreeing to a price structure which allows publishers to set their own prices for its iBooks service and then pay a portion of their sales back to Apple.
The DoJ has claimed that the agreement allows the publishers to name their own prices, effectively taking away the right for competing e-book retailers to set the price charged on their own online storefronts.
Apple, meanwhile, has maintained that the service is not only compliant with the law, but is in fact the best hope consumers have for breaking an e-books monopoly held by Amazon.
The US DoJ is not the only group to challenge Apple's pricing structure. The EU opened a probe of the service in December of 2011, while authorities in Australia have recently begun their own investigations.