I was reading the blog Catherine, Caffeinated where she talks about unpublishing her novel after disappointing sales. I admire her honesty in this post:

http://catherineryanhoward.com/2012/...ublished-novel

But it also got me thinking: when should a self-published author withdraw their book(s) from Kindle, Smashwords, Kobo and all the rest? What is the real measurement of success?

I ask because I have been concerned about the sales of my book, which is my first. Although sales have been scant, I had over 500 downloads during my two free days on Kindle. Some readers liked what I wrote, others thought it was OK. I released my book this past September and I'm working on its follow-up. When should I admit that its no longer worth it and unpublish my book?