Monsters of Men

Blurb

Monsters of Men is a young-adult science fiction novel by Patrick Ness, published by Walker Books in May 2010. It was the third book of the Chaos Walking trilogy inaugurated two years earlier by The Knife of Never Letting Go. Walker's U.S. division Candlewick Press published hardcover and audiobook editions within the calendar year.
Ness won the annual Carnegie Medal from the British librarians, recognising the year's best new book for children or young adults published in the U.K.
The title is from dialogue in the first two books. Todd Hewitt's adopted father Ben says "War makes monsters out of men" in The Knife, which both Todd and Viola later quote.