*NO PURCHASE NECESSARY. Offer expires on 8/17/21 at 11:59 PM. It is valid in the United States only, and limited to one ebook to each of the first 300 instructors at accredited colleges. Those who qualify will receive a download code and instructions by 8/19/21. eBooks will be distributed via Glose, a free digital reading platform. All sample copies are given at the discretion of HarperCollins.