In case you missed the spam email that flooded many Smashwords author inboxes, you need to know the latest indie news: series have come to the site. Smashwords has unveiled a new function on the site that allows series books to be grouped together, and it's pretty easy to implement.
To unite your series books as a unit, log into your Smashwords account. A link to the Series Manager tool should appear right on the homepage. Click it and begin following the steps to create a new series. You'll be guided through the process, and taken to a page where you'll find a list of all your books. Click the relevant titles and keep following the steps until you get to the end (it shouldn't take more than a few minutes).
Once you're done managing your series books, a new link will appear under those titles. This will take you straight to the series page for that book series. Smashwords plans to use the tool to make book-buying easier for customers and selling easier for authors.