Boxset, box set, boxed set, I've been asked to add all three titles to covers when designing them for clients. But regardless of which terminology you prefer, here's a few things to consider when creating your box set.
As yet, other than releasing a series of books as one physical book, there is no option to print on demand publish a series of books. So here's I'm referring to ebook publication only.
The Insides
Many authors argue that a table of contents isn't necessary for fiction, and unless you have front and back matter of interest, I'm personally fairly indifferent to the idea of having a list of chapters in a table of contents. However, for books created as a box set, it's vital. Books making up an ebook box set are contained in one document, and the only way to navigate from one book to another is to have a table of contents directing readers to the title page of each book.
You can also trim down front and back matter, having a combined copyright page, dedication, acknowledgements and a single page at the back of the set with links to other books and author website and social media.
The Cover
Many box sets, even ebook box sets, have a 3D cover. However, many people design their 3D covers with a white background:
Great in theory, but whilst a 3D boxset can be published successfully through retailers like Amazon, some other retailers, such as Smashwords and Apple, don't accept them. How do you get around the problem, short of designing a 2D cover?
I spoke to support staff at Smashwords and they/Apple will accept covers which have a 2D element, including the title and author name, which means they will accept a file similar to this:
I spoke to support staff at Smashwords and they/Apple will accept covers which have a 2D element, including the title and author name, which means they will accept a file similar to this:
You still get a great 3D box set image in there, just with the addition of the background and author name/titles. The cover doesn't have to be 3D at all, of course, but it does make a nice differential between single books and sets of books.