This title is a real-time online purchase. You will be emailed an activation code on purchase, not mailed a physical product. Skillworks titles are now accompanied by digital obooks for the first time. Oxfords premium digital resource for students and teachers, obooks are available as a standalone resource and are also included with every Skillworks book purchase. The obooks offer students online and offline access, on any device, to a digital version of the text as well as the ability to add notes, bookmark, highlight, access the integrated complimentary Concise Oxford Dictionary, save answers and export work.