An introduction to compost heaps that explains how they are made, what types of insects live in them, and why they are beneficial. Read Me!: Horrible Habitats series. Interest Level: 3-6 Reading Level: 3.7 ATOS Book Level: 3.7 AR Interest Level: LG AR Points: .5 AR Quiz: 134112EN Lexile Measure: 660 Lexile Code: NC (Non-Conforming Text) Guided Reading Level: M.