If you're not familiar with the idea of a bundle, here's an explanation of how it works (taken from StoryBundle.com):
There are a fixed set of books that we offer in a bundle, and each bundle is available only for a limited time. If you miss out on the bundle, you'll have to buy the books individually from each author. We feature each bundle only once, once it's gone, it's gone.
One of the central concepts is that you get to decide how much each bundle is worth to you. Think each individual book in a bundle of five books is worth $2? That's fine! Pay $10 and get five books! Only think they're worth $1 each because you're not sure if you like a certain genre? That's fine too. If you want to reward these authors and encourage more independent writers by giving a bit more, that's fantastic as well. One reason we started StoryBundle is because indie authors need our support, and we want to do our part in showcasing awesome writers.It will be fascinating to see how this works from a writer's perspective. As a reader I can really see the sense in it - a curated bundle of novels, some or all of which I'm pretty sure I'm going to like.
The bundle should be available towards the end of the year.