This has to be one of the best books on sketching that I have read yet. The author is an award-winning watercolor painter who graduated from Cleveland Institute of Art. He developed his sketching techniques while spending time in India, purposefully seeking better methods of productive drawing that would be useful for creating paintings back home. Besides many samples of drawings and exercises to do, the book covers topics such as the difference between drawing and sketching, how to draw faster, how to optimize use of photographs along with sketches, improving observation skills, making better compositions, maximizing productivity, how to capture a likeness of people or animals and much more! This is a great reference book for any artist who wants to improve their on-site drawing skills.