For any help related with sketching & drawing you can consult the Sketching: Collins GEM book. The book is ideal for those who want to learn how to sketch & provides useful tips for artists to remember when they start working on their sketches.
At the start of the book all the different tools that you need for sketching have been enumerated which include pencils, different sketching pads, charcoal, pens, pastels, coloured pencils & other necessary items. After which the basics of sketching & the different techniques used are elaborated. The book emphasizes on the way you use the pencils & how to play with light. It also teaches how to sketch inanimate objects & scenes like landscape scenery, flowers & fruits & other figures. Animate objects like animals have also been included.
The book is easy to carry around & travel with. It also has a section on tips from known artists that encourage you to sketch your own portraits. The book has useful guidelines & is precisely written so that you find what you need.
Sketching: Collins GEM has been written by Jackie Simmonds who is a painter & art instructor herself. She currently writes for the Artist Magazine & has also written three books. This paperback book can be easily ordered online with the ISBN-13 number of 978-0007286805 and ISBN-10 number of 0007286805.