‘Blake’s Scattered Leaves’ explores the sibylline poetics of the poet and printmaker’s book making in America, Europe, The First Book of Urizen, and The Four Zoas, rematerializing Blake’s practices of invention and composition within and against constraints and teleologies of printing. Attention to material cultures of book making produces new readings of Blake’s sibylline metaphors and poetical possibilities, and practices of interleaving, repurposing of proofs, demediating the text, and freeing images as separate designs. Blake exploits the constitutively mobile potential of full-plate illustrations produced in different workshops, retaining that mobility in his illuminated books, where different placements make each copy unique and blur boundaries between different books. To capture the dynamic trajectories of mobile book parts or independent art works is to reconfigure the hybrid history of Blake books, questioning distinctions between book parts and artworks crystallized by institutional divisions of knowledge that separate the library from the print room.