“What would it be like to stay in one place — to have your own bed, to ride your own bicycle?” a little girl named Anna wonders in Maxine Trottier’s 2011 picture book, “Migrant.” “Now that would be something.” Anna’s parents, who are migrant workers, move from one temporary home to another, and Anna imagines herself as a rabbit, living in abandoned burrows, or a bee, flitting from flower to flower. She is effectively homeless, and longs to live a settled life, “like a tree with roots sunk deeply into the earth.”