Serial Box tells both original stories and franchise extensions. One interesting example, a sequel to the five-season-long sci-fi television show Orphan Black in book/audiobook form, airs its final episode. The show's lead actress, Tatiana Maslany, even narrated the audiobook.
Serial Box has also teamed up with Warner Bros. for DC superhero stories including Arrow, The Flash, and Supergirl, and has a Marvel comics story about Thor launching in December. Part of the strategy behind picking franchises, is finding brands that their pre-existing audiences are already excited about.

"We're creating entirely original stories as well as telling new stories around some of fandom's most popular shows and characters. Our commitment to Originals hasn't wavered – Franchise content complements our strategy really well because we choose Franchises where we know there is strong audience overlap for our Originals." CEO and cofounder of Serial Box, Molly Barton

Writers take a slightly different approach to existing franchises than they do to originals.
"When we're working on an original serial, we spend a lot of time getting to know the characters and the world they live in, so that we can then go back and work individually on episodes," says Malka Older, science fiction writer at Serial Box.

"It requires a deep understanding of the fandom – fortunately we work with a network of hundreds of the smartest and most talented writers to help us interpret the data we have about fandoms and to bring the soul of these characters and worlds forward even as new events occur and new characters are introduced in the Serial Box series."

Television shows benefit from their unique format: They can evolve with each season, taking listener feedback into consideration or incorporating current events into a storyline. The years-long process of book publishing isn't as forgiving. Serial Box's turnaround time of months or even weeks gives their stories the same advantages television enjoys.

One of the most exciting aspects of television is the scripts are finalized and episodes are shot so close to when the show airs, that current events can have a presence in the story. Charles Dickens wrote this way with his serials - if a new pub opened in London, Dickens would mention it in that weeks' episode. Serial Box series reach listeners and readers within a couple of months, sometimes within weeks, of completion and so the content can refer to what's happening in the world.

"Because we release in installments, we closely observe what listeners and readers most enjoy (or dislike!) about a given series, and we share that input with the writers. In some cases we expanded the role of minor characters that were clear fan favorites and we've altered the outcome of a given season to set up the next one a bit differently than originally planned." Malka Older, science fiction writer, at Serial Box.

Audience engagement is a big concern for any book publisher: In a world packed with streaming TV show debuts and Twitter memes, a new book title can find it hard to break through to its audience, no matter how great it is.

Serial Box is focused on delivering immersive stories in short installments that fit your day. Each story installment is structured to be satisfying in and of itself, but they also build a season long arc, so listeners and readers want to know what happens next.

The approach is working: Nearly 70 percent of Serial Box's listeners and readers return more than once to read or listen to the whole series. Part of the appeal to Serial Box is just how unique today's audience finds the experience of reading or listening to (rather than watching) quick, serialized episodes.

While we're very used to serial storytelling on television shows, we've gotten out of the habit of reading that way, so the Serial Box model of episodic stories creates a different rhythm of pacing that can be exciting for readers and writers alike.