By Adam BoretzHere at Publishers Weekly and Listen Up, we’re always looking for interesting and unconventional uses of audio as a way to enhance storytelling.And that kind of outside-the-box storytelling is nothing new to digital publisher Sideways.  The company is offering a combination ebook, iTunes app, and audiobook for a project called David Roberts Egypt.According to Carolyn Fertig at Sideways, David Roberts travelled to Egypt and the Holy Land in the 1800’s, sketching many images and writing extensive journals about his travels.When Sideways began producing an ebook and app based on Roberts’s travels, the company wanted to bring his journals to life. So, they hired a voice actor to read the journal entries.“What’s most interesting about these audio files is the way that we combined them into an ePub,” Fertig writes to Listen Up. “We found a way, using about four different programs, to add these files to the ePub flawlessly and without disturbing the user experience.  There is over 80 minutes of audio to listen to.”To listen to a sample, CLICK HERE.And, for more information, check out this propmotion video: