I am not sure how this works. I buy a lot of books; some say actual page numbers and some just say the size of the book. I get this on new and older books. It was have something to do how the book is loaded into Amazon.
Not well known authors. I have 275 books on my kindle archives. I just look for something different but I want to know the length of the books. Well known books you want no matter. All of my 275 books have the length of the book listed. Just wondering what happened to change that.
Returning Kindle Books Books you purchase from the Kindle Store are eligible for return and refund if we receive your request within seven days of the date of purchase. Once a refund is issued, you'll no longer have access to the book. To request a refund and return, visit Manage Your Kindle, click the actions tab for the title you'd like to return, and select "Return for refund."
All the ones I just looked at say either "# pages (estimated)" or "# pages (contains real page numbers)"
I've been reading a lot of those $0.99 novellas lately (Hugh Howey's Silo series, JF Perkins renewal series, etc) so I expect them to be short. I've never bought any kindle book that disappointed me in length. Granted some I just didn't want to end, but that wasn't a word count issue. As far as fiction in fact there's only been one book so far which I decided to stop reading on account that I wasn't enjoying it. (It was a sci-fi book which seemed to be far too focussed on technical details--such as all the various parts and components of a shuttle engine--and had little actual content to speak of).
I've read a lot of books on my iPhone kindle app. Now I actually own a Kindle HD too! (Though mostly I got that for my son to use with FreeTime, which is working out great).
Because the Kindle screens are of varying size and because the fonts can be adjusted by size, margins can be adjusted, page numbers are not used in most Kindles. If I want to know the number of pages, I look at the paperback or hardback copy to get an approximation of length.