Professor Wilkinson's retirement gift.
Price example, 1 copy
Hardcover Premium, cover and interior in full colour - 105$ (2nd book 53$)
Hardcover Basic, black/white interior - 27$
Soft cover Premium, cover and interior in full colour - 78$ (2nd book 39$)
Soft cover Basic, black/white interior
Spiral bound, cover and interior in full colour - 71$ (2nd book 35$)
½ price off! If you order more than 1 copy of the same book, you will get ½ price off additional books in the same order! The discount is deducted when you increase the number of books. Note! Does not apply to BASIC.