The next e-reader I get isn't going to be one of these.
Here's a good article about the way novel lengths have been influenced by technology and marketing, with an except I found particularly enlightening:
Awaiting a proof copy of my new novel "The Fall Of The Hammer".
How the Open Library, digital resources, and my own reading habits have changed my bookbuying.
New tools for publishing on Kindle are a major step forward.
Now you can get signed editions of my e-books -- sorta-kinda!
How to fix publishing? Fix publishers, readers, books, all of the above?
Ebook.