I wrote a sci-fi short novel that received a good feedback (surprisingly not at Amazon, where nobody has reviewed it). It's placed at the iBookstore and the Kindle store, and it sells some units from time to time:

http://www.amazon.com/value-memories-Carlos-Paramio-Danta-eb...

https://itunes.apple.com/en/book/the-value-of-memories/id573...