Book excerpt: Tim Slater and Roger Freedman have worked to improve astronomy and overall science education for many years. Now, they’ve partnered to create a new textbook, a re-envisioning of the course, focused on conceptual understanding and inquiry-based learning. Investigating Astronomy: A Conceptual Approach to the Universe is a brief, 15-chapter text that employs a variety of activities and experiences to encourage students to think like a scientist.