The layout, graphics and reading level of this text will appeal to upper elementary and junior high students interested in, or studying about, light. In addition to readable explanatory text, there are experiments to help students understand the properties of light: – its direction, speed, colour in light seen through a prism, reflecting and refracting light, how the eye sees light. Students will learn about the power of light in photosynthesis and the water cycle, and appreciate recent technological advances in light through fiber optics, photographic and medical imaging equipment. The text is well-organized under Chapter headings (often posing an essential question), and coloured sub-headings. Elementary students will stay engaged with “Did You Know?” bubbles, clearly labelled diagrams and illustrations, plus “Words to Know” boxes on every page showing definitions immediately without having to turn to a glossary. On many pages, a quirky owl with large eyes, offers humourous riddles about light. Many pages include QR boxes that will extend the topic for students or classrooms equipped with devices that support an app to read the QR code. A good resource for Grade 4 Science – Light and Shadows.