Note: Most of the titles listed above for teachers and students cost about US $1. The links (click on the book cover) will take you to the Amazon US store; the price should be about the same in Amazon stores in other countries. However, in some countries, you may see a VAT of $2 added to the title. If you would rather not pay $3 instead of $1, we advise purchasing the books through Smashwords. Smashwords carries all of our education titles, at our lowest prices, and offers a variety of electronic formats, including html, .pdf, .epub (for Nook), and .mobi (for Kindle). The books are also available through Barnes & Noble, the Apple iBookstore, Kobo, Sony, and Diesel.