this competition. There are quite a lot of terms and conditions, which I advise you to read carefully before entering (as indeed you should with any competition). Basically though you need to write a book of at least 5,000 words, in English and self publish through Amazon's kdp Select Program before 20th May.
I have several books available through kdp, including Paint Me A Picture. Unfortunately they're not eligible as competiton entries need to be newly published.
Can't see me finishing my current project in time to enter... hmm, wonder if a short story collection would be acceptable?