A squirrel nibbling an acorn may go unnoticed in the backyard, but these entries in the Who Eats What? series show the importance of food chains around the world. Each title introduces a particular biome and its climate and uses a map to show where each exists on the planet. The bulk of the accessible text focuses on the makeup of food chains, including producers, consumers, predators, and, finally, decomposers, which help start the cycle again. Mountain Food Chains describes how mountains contain a variety of ecosystems and how animals living there have produced adaptations to handle extreme weather and terrain. Each book presents examples of multiple food chains in multiple formats, such as narrative depictions, charts, and high-quality color photos. This visually enticing series will make learning early science standards an enjoyable mission.