The Complete Book of Sketching
I have had this book for many years and never get tired of dipping into it. Many books about drawing concentrate on one topic: landscape, seascape, still life, life drawing etc. The joy of this book is that it does a little of everything. It covers seasons, lighting, use of the camera, composition, perspective and just about anything else you can think about to do with sketching. My husband, who claims to know nothing about art, bought this for me. I have to say that it is the best reference book about sketching that I have ever read (and I have read a few!)
Being an older book,It's not always easy to locate but you may find a more recently printed verson somewhere. I found mine years ago in a secondhand bookshop! One of the authors of the book, John Hamilton, has produced a book with a similar title ''The Complete Sketching Book'. However, I have not seen it so am unable to recommend it.