Published by Roaring Brook Press

Summary:  Sharks can seem scary, but a world without sharks is even scarier.  Because they’re at the top of the food chain, they keep the populations of their prey in balance.  By feeding on weaker animals, they allow the stronger ones to reproduce and survive.  Williams makes the case that removing sharks from the ecosystem could ultimately destroy the oceans and all the animals that depend on it for life–including humans.  The final two pages include additional information on why sharks are in trouble and what kids can do to help save them.  Also includes a glossary and bibliography; labeled drawings of a variety of shark species are included on the endpapers.  40 pages; ages 4-8.

Pros:  A simple yet scientific explanation of the interconnectedness of all species.  The focus on sharks will make this a popular choice for kids.

Cons:  The destruction of all life on earth is kind of a downer.