Knox's first young adult books, "Dreamhunter" and "Dreamquake", were published in 2005 and 2007 respectively, as the "The Dreamhunter Duet" series. Jolisa Gracewood, reviewing "Dreamquake", described the book as a "Mansfield-meets-Mahy fantasy" and praised Knox for her audacious imagination and ingeniously constructed tales. In 2008, she published a collection of non-fiction, "The Love School: Personal Essays", which was shortlisted in the 2009 Montana New Zealand Book Awards. Since 2013 a quotation from "The Love School" has been featured on a concrete plaque forming part of the Wellington Writers Walk, a series of quotations installed along the Wellington waterfront.