Each month in our print issue of SLJ we’ll be publishing reviews of some of our favorite apps and enhanced books. The reviews, which were originally featured in our blog “Touch and Go,” aren’t without criticism, but we feel these products represent some of the best titles in a new field. After each review, you’ll find the date it appeared online. Online, there are links to related resources, a trailer (if one exists), and a “purchase” button. Please note that later versions of some of these titles may now be available.