Campfire: Books Bonus Content is a reading application designed for iPhone users that enhances the reading experience by offering not just e-books, but also bonus content curated by authors. Users can unlock short stories, character profiles, exclusive artwork, and worldbuilding notes as they read, allowing for a deeper engagement with the narrative. The app features over 300 books across various genres, with new titles added weekly, and offers personalized recommendations based on user preferences.

The app also provides a customizable reading experience, allowing users to adjust typefaces, font sizes, and background colors to suit their comfort. With offline reading capabilities, cross-device synchronization, and an emphasis on supporting authors with generous royalties, Campfire caters to avid readers looking for a more immersive and interactive literary journey. The app is free to download, with in-app purchases available for additional content.