Brandon Mull's work often extends beyond the text of the book into interactive and digital formats:
: In his Fablehaven series, he released the Book of Imagination , which is unique because it is "half-finished". It requires the reader to act as the "missing ingredient" to complete the story and puzzles.
: Choosing the EPUB format over PDF provides a Table of Contents and a lighter file size, making it ideal for offline reading on mobile devices.
: Authorized digital copies are available through major retailers like Amazon (via "Manage Your Content and Devices") and Barnes & Noble.