Gustavo Guglielmotti 
Learn how to draw in 20 minutes [EPUB ebook] 
Using stupidity as a creative power

This book contains exercises set up to intentionally deactivate the part of your brain that prevents you from drawing. There are guided exercises where you have no other option but to learn how to draw.
Doing the first exercises will show the person just how easy it is to draw even a complicated drawing. The exercises will also help the learner understand how the mechanics acquire the awareness of being able to draw whatever a person has in front of them.