I had saw some demonstrations by H. Borgman in the excelent "Draw it! Paint it!" fascicle some years ago and became fascinated by the author tecnique.
Now with that Dover edition of "Pen and pencil drawing techniques" I found the complete basis of the Borgman Tecniques!
The book is divided in two parts:
1)"Pencil Drawing" - Telling you anything about pencil types and brands,stroke techniques, tonal lessons,colored pencils and many experimental techniques.
2)"Ink techniques" Is too, rich in exemples of types of pen and brushes, kinds of ink, stroke techniques, pen and brush combination, types of papers, colored ink, and many experimental demonstrations.
Soo you have two books in one, covering all that you want to know about that two basic and exciting techniques- pencil and
Buy that book and you will have a great companion to help you
improve your drawings from sketches to finished work!!