The following are some foreign sketch books written by foreign authors: The Art of Sketching ·Castanida (Los Castanida) 2. Sketching Basics- ·Hawkes ( ·Hawkes) Sketchbook: A beginner's Guide to Sketching ·Peter de Vries 4. The Art of Drawing and Painting: From Beginner to Advanced ·Tim Brown Sketches: A Color Pane for Sketches ·John E Scott The Art of Sketching ·Paul Crea The above books are all foreign sketching materials that cover different levels of sketching from beginners to advanced sketchers. They are suitable for readers who want to learn sketching.