This work investigates the scope and distribution of printed materials produced in England or for the English market during the fifteenth century. E. Gordon Duff, a distinguished bibliographer and librarian, utilizes his extensive expertise in early printing history to catalog the output of the first century of English typography. The text provides a systematic framework for identifying and dating incunabula, establishing a foundational record for scholars of early modern print culture.

Experts consider this volume a foundational reference for the study of early English printing and bibliographical history. Scholars frequently note the meticulous detail and technical rigor of the entries, which remain essential for identifying rare fifteenth-century editions.