Since the advent of digital publishing, researchers, artists and publishers have responded to the transformation of the book through a number of prototypes, experiments and collaborations designed to model new forms of authorship, editing, reading and circulation. But these experiments are scattered and often poorly maintained, making it difficult for book innovators to build on past insights and inventions. How should we archive born-digital materials so they are stable and easily accessible? What ad hoc archives and repositories already exist that could be a foundation for archival work on the future of the book? How can archivists identify, collect and assemble grey literature and other elusive texts into archives documenting the past and present of the future of the book?