Gr 6 Up—Social media apps like Instagram, SnapChat, and Twitter connect millions of people to each other every day and have changed the ways in which millions communicate. Along the way, the companies behind the technologies have grown more prominent, and this series introduces readers to the global corporations that have become ubiquitous with information-sharing and social networking. Each book examines its subject's founding, growth, technological innovations, and future aspirations as well as its sometimes-complex relationship with society; fortunately, the series does not shy away from addressing the controversies, providing teens with a more complete and balanced perspective. At the end of every chapter, students will discover "Text-Dependent Questions" that should challenge their reading comprehension, as well as "Research Projects," which suggest possible avenues for additional independent study. Thought-provoking sidebars and embedded QR codes supply additional content-rich material. VERDICT A first purchase for middle and high school students.