Free on Saturday, Dec. 22nd, and Sunday, Dec. 23rd.
I've put my book on free promo that day - it's title is The End of the World Sucks. It's the Kindle version available for free download on Amazon.
If you don't have a Kindle, you can use the Kindle reading app on your PC, tablet, or smartphone. Or if you have some nebulous plan to one day own a Kindle or tablet, you can download books now - probably stick to free ones - and choose to put them in Amazon's cloud storage.
Later, if you read it and like it, you can leave a review. Or if it's not your cup of tea (thanks, Kate Policani) perhaps you know someone else that may enjoy zombies, a vampire, and people behaving badly.