Boo's voice achieves these qualities in large part because she adheres admirably to the old admonition to "show" not "tell." Notice the lead, which sets the tone. She uses concrete detail to make her case, while portraying character. In the 19th paragraph, which describes a model program for the mentally ill, she relies on verbs rather than adjectives to describe the program: "...the walls blaze with the oil-paint issue of Saturday art classes at the Corcoran. A staff member flips flashcards to teach a resident her address. Another resident peels carrots and accepts congratulations on the second anniversary of his Arlington movie theater job." Such writing asks a reader to do more, to draw conclusions; it is also more persuasive and powerful.
Boo's series had impact: It led to policy reforms.
Read “Forest Haven Is Gone, But the Agony Remains,” by Katherine Boo