Two photographs of the same creek in Yellowstone, thirty years apart: one bare and brown, one green with willows and ponds. A scientist wants to know why. Ava already knows. It's the wolves. Everybody knows. Five days, a tape measure, and a storm will tell her otherwise.
Green Guardians
Ages 10–12Green Guardians is a series of illustrated adventures for readers aged ten to twelve about conservation and looking after the living world. Ava, who organises everything, and Mateo, who can read a track in the mud, belong to a quiet network of young rangers run by Ranger June, and answer real requests for help from scientists and communities. Each book delivers one conservation topic through a real place and a real problem, and shows how things are connected.