Amazon is believed to have offered book publishers a large fee for joining the service. However, the negotiations are said to still be in their early stages. The Seattle-based technology company, which is expected to imminently launch a tablet device to rival Apple’s iPad, has also said that the digital ebook library would feature older titles and be accessible to those who pay for $79 a year for Amazon Prime, the service which allows people unlimited two-day shipping and films and TV shows on demand.