Macmillan has announced that they will sell enhanced ebooks for select titles that they feel will become bestsellers. They will be released on the same day the hard cover edition comes out. These enhanced ebooks will include author interviews, reader's guides and other unspecified material. The enhanced ebooks will cost more than the hard cover books and will only be available for 90 days. After this, the ebook version of that title will revert back to the standard type of ebook.
This is in contrast to some other big name publishers who believe the best way to sell ebooks is to withhold them and let the print book get its time in the sun and only bring the ebook out much later.
Despite what the pessimists say, this is actually an exciting time for publishing. There are myriad of ideas of how the publishing industry can embrace new technologies. I think Macmillan's idea is fantastic. What do you think?