If you have a Kindle or iPad with the Kindle app, I suggest checking out One Hundred Free Books (onehundredfreebooks.com). It is a curated site of free books found on the Amazon Kindle page.  I am pretty cheap and usually scour Amazon looking for free or $0.99 books for my Sci-Fi fix.  I have them added on my Facebook page and they send out daily reminders. A friend said that it is mostly romance novels but it changes day-by-day and I have found some pretty good reads.  I currently have “Titanic with ZOMBIES” waiting to be read.      🙂