The adventures of Cave Bear and Duck first appeared in some independent comic books. I later turned this story into an interactive iPad app that featured a read along soundtrack with sound effects and character voices perform by the great Tom Kenny. But keeping the iPad app up to date was a lot of work (it was always a free download) and I pulled the app. By this time ebooks (the epub format) supported sounds so I reissued the comic book as an ebook available in the Apple iBookstore. It's a free download and features the ability to turn the 'read along' soundtrack on and off on each page. You can download it here.