In the book What if there were no gray wolves Slade discusses what would happen to the temperate rainforest system if all of the gray wolves were gone. I chose this book to tie it to the NGSS standard about Ecosystems: Interactions, Energy, and Dynamics which asks students to develop a model to describe the movement of matter among the plants, animals, decomposers, and the environment. I think that this would be great when talking about chain reactions in ecosystems and it was great for teaching in the pacific northwest which is a temperate rainforest ecosystem.