Engraving
Free to read here, from Project Gutenberg.
Engraving: Its Origin, Processes, and History
Suppressed Plates, Wood-engravings, &c.
Prints and their makers: essays on engravers and etchers old and modern
The Best Portraits in Engraving
The Essentials of Illustration
Engraving for Illustration: Historical and Practical Notes
Ariadne Florentina: Six Lectures on Wood and Metal Engraving
Albrecht Dürer's Kupferstiche, Radirungen, Holzschnitte und Zeichnungen
Engravers and Etchers
On the Processes for the Production of Ex Libris (Book-Plates)
Fine prints
A gravura em Portugal: breves apontamentos para a sua história