Originally Posted by tompe
The paperback publisher and the hardback publisher are different entities. The paperback publisher seems not to have put out an ebook version yet.
The HC, MMPB and eBook are all from the same publisher, Grand Central (aka Hatchette).
The paperback of that book just came out (before a few weeks ago it was $12.99 vs the HC price).
Either the publisher is screwing around trying to see if ebook readers will still pay the higher price or they're just incompetent about getting price changes done when the mmpb is released is the question. Back in the earlier days of ebooks this "forgetting" to lower the ebook price was quite common and would usually only get changed when the publisher was called on it. Hatchette and Macmillan especially seemed to have this problem in the past.