Through colorful, detailed photographs, informative sidebars and diagrams, and well-organized, brief chapters, these books provide an accessible introduction to biology topics. At the same time, they introduce a level of intellectual rigor rarely seen in texts written for elementary students. . . . The superb questioning has students considering author’s voice by comparing text to primary sources…This series will engage and challenge students; teachers will also be interested in this series as a valuable resource for incorporating Common Core reading, questioning, critical thinking, and writing in their science curriculum. Highly Recommended.