X-Books are for kids who love facts—especially in bite-sized portions and about fascinating, true subjects. As plentiful images and graphical representations stimulate visual perception, readers will be drawn into learning how to use informational texts. Each title is framed by a signature Top 5 countdown feature that not only serves as an example of sequential order but also narrates a brief story within the main topic: in X-Books: Mythical Creatures, these sidebars summarize the physical features and unique aspects of some of the most fascinating mythical creatures in history. Count down the world's most extreme mythical creatures, and launch a lifetime of reading without limits! A countdown of five of the most intriguing unicorn encounters provides thrills as readers learn about the legendary characteristics of these mythical creatures.