John Ruskin 
The Elements of Drawing, in Three Letters to Beginners 

'The Elements of Drawing in Three Letters to Beginners’ is a self-reference book on drawing by Reskin, based on his letters to several women whom he taught drawing. Ruskin believed that learning to draw gives a person a feeling of fulfillment. Therefore it should be made accessible to anyone. This book became the embodiment of his ideas and a challenge to other drawing manuals of his time.