This is false, and the opposite is true!
A want, used as a noun, refers to something that is not necessary, but something that is wanted, desired only.
A need, in contrast, refers to something that is necessary, so it is not merely something that is wanted, but something that is very essential.
Clustering is a type of prewriting that allows you to explore many ideas as soon as they occur to you. Like brainstorming or free associating, clustering allows you to begin without clear ideas.
Answer:
An epidemic of fever sweeps through the streets of 1793 Philadelphia in this novel from Laurie Halse Anderson where "the plot rages like the epidemic itself" (The New York Times Book Review).
During the summer of 1793, Mattie Cook lives above the family coffee shop with her widowed mother and grandfather. Mattie spends her days avoiding chores and making plans to turn the family business into the finest Philadelphia has ever seen. But then the fever breaks out.
Disease sweeps the streets, destroying everything in its path and turning Mattie's world upside down. At her feverish mother's insistence, Mattie flees the city with her grandfather. But she soon discovers that the sickness is everywhere, and Mattie must learn quickly how to survive in a city turned frantic with disease.