Terms and Conditions

eBooks include updated page numbers and charts, however the content is the same as the paperback version.

©Robert Harkrider, 2021. All Rights reserved. No part of these books may be reproduced in any form without written permission of the author. Printed in the United States of America. IT IS ILLEGAL AND UNETHICAL TO DUPLICATE COPYRIGHTED MATERIAL. The material in these books represents a sizable investment in time and finances on the part of both author and publisher. If lessons from these books are photocopied and distributed to avoid buying a book for each class member, the author is defrauded of rightly earned royalties, and the publisher does not sell enough copies to continue publication.