This fascinating book explores the role bacteria play as decomposers. Readers dive in to what bacteria are, how they decompose, and how they fit into ecosystems. This book also includes a "That's Amazing!" special feature, several "Did You Know?" facts, a table of contents, quiz questions, a glossary, additional resources, and an index. This Focus Readers book is at the Beacon level, aligned to reading levels of grades 2–3 and interest levels of grades 3–5.