Drawing Trees and Leaves: Observing and Sketching the Natural World (The Curious Artist)

Illustrators Sketchbooks

Lines of Inquiry: Multidisciplinary Methodologies in Drawing and Education

Independently Published Learning How To Draw: Over 1000 Drawings To Sketch In Under 5 Minutes (For Kids And Adults With 3 Levels Of Difficulty)

Botanicals: Secrets of Observational Drawing : Valerie Baines