E-book sites make it easy to locate books — and in many cases read reviews and view books on the same or related topics. You have probably purchased or previewed pages from books on commercial sites, such as Amazon, Apple, Barnes & Noble, and Sony, but you may not be as familiar with open-access sites. These sites, such as Project Gutenberg and the Internet Archive Community Text collection, provide free access to historical texts that are no longer under copyright, as well as to books released under various open-access licenses. You can also locate books through Google Books, which offers books from leading publishers and university libraries, including Harvard, Stanford, and the University of Michigan. Skimming the interior of a book (its table of contents or its introduction, for instance) on your computer, tablet, or smartphone can be an incredible time-saver in the long run. E-book sites include