If you want to adopt (or are considering adopting) one of our paperbacks for a course, ebooks are free for 60 days (fill out and submit the form below), after which your access will cease.

Or you can pay $10 for perpetual ebook access. Click here for an order form.

If you prefer a print copy of a paperback, they are available for $10 in the US and $20 in Canada. Click here for an order form.

Hardcover titles (print or ebook equivalent) are available at a 50% discount, plus shipping for print books ($10 in the US; $20 elsewhere). Use order form referred to above.