Here's another social studies series for the youngest learners—this one, called "Caring for the Earth," intends to introduce early readers to the concepts of conservation and recycling. Each slim, square book starts with a statement of the problem and then offers two short chapters with ideas that kids can use to help solve it. With simple sentences on the right-hand pages and a large-scale color photo on the left, this title explains that though water is essential to all life, only a small amount of Earth's water is safe for humans; our water supply is endangered by pollution and waste. Emma, Josh, Maria, and Emily demonstrate saving water by turning off faucets while brushing, taking quick showers instead of baths, filling up the dishwasher, and clearing trash from lakes and oceans. Final advice to readers: "When you save water, you help Earth stay healthy. Then we can all enjoy the water we need." While the color photos are cheerily bright and attempt to draw in viewers by using children as models, the text makes rather obvious suggestions (some depending on the cooperation or decisions of parents) that many teachers already incorporate in their lessons. Still, building values begins with creating awareness—these small books can be used as introductions to units or as starters for discussion; they could also form a classroom library for kids to read on their own. Included for more advanced readers are a glossary, a short bibliography, a Facthound code for Web sites (very limited), and an index.