After leaving the University of Canterbury in 2009, Newton became a full-time writer and has held a number of writing
residencies. He was appointed the 2010 JD Stout Fellow at Victoria University, he was the 2014 Writer in Residence at the
University of Waikato, and he was one of two
Ursula Bethell Writers in Residence at the University of Canterbury in 2017. In 2009, Newton's book
The Double Rainbow: James K. Baxter, Ngāti Hau and the Jerusalem Commune was published by
Victoria University Press. The book is a history of New Zealand poet
James K. Baxter and his time spent establishing a
commune at
Jerusalem, New Zealand in the late 1960s and early 1970s. As part of his research for the book, Newton interviewed former members of the commune and other local residents. Writing in the
Waikato Times, reviewer Peter Dornauf said: "
Double Rainbow is a scholarly, readable and fascinating account of events at the tipping point in our cultural history." In 2017, Newton published the first of a planned trilogy about 20th century New Zealand literature, entitled
Hard Frost: Structures of Feeling in New Zealand Literature 1908–1945. Hugh Roberts, writing in the
New Zealand Review of Books, praised the book as "wise, human, witty and compassionate", and said: "If there is a better book on New Zealand literature ... I have not read it". In early 2019, Newton was the first reviewer of a collection of letters by James K. Baxter, edited by Baxter's friend
John Weir. Writing in New Zealand online magazine
The Spinoff, Newton observed that as a result of the publication of these letters "it's no longer possible to talk about [Baxter] without addressing the ways that he thinks and writes about women". He highlighted Baxter's letters to other female poets, and that they "also provide a distressing insight" into Baxter's marriage to
Jacquie Sturm. The letters' "most appalling disclosure" was the confession to a friend in 1960 that Baxter had raped Sturm. Newton wrote that "it won't be a surprise if, for many potential readers, this statement comes to drown out everything else that Baxter wrote". After the review, Newton was asked by another journalist why he left the subject of Baxter's relationships with members of the commune at Jerusalem out of his 2009 book
Double Rainbow; Newton explained that during his preparatory research it was clear that people did not want to cause Sturm embarrassment, and further that he felt that these issues would drown out "the bicultural dimension, the collaboration between the pā and the hippies". In 2019, Newton received the
Robert Burns Fellowship, one of New Zealand's most prestigious literary awards. The award provided him with an office in the English department at the University of Otago during 2020. He said he intended to use the time to write the second instalment of his New Zealand literature trilogy, following on from
Hard Frost, which will cover the 1946 to 1968 period. A final instalment is planned to cover the 1970s and 1980s. The first few months of Newton's fellowship were spent in lockdown due to the
COVID-19 pandemic. In August 2020, Newton's book about the life and works of sculptor
Llew Summers,
Llew Summers: Body and Soul, was published. Newton had decided to write the book after living and working in a cottage in Christchurch that had been loaned to him by Summers: "I thought it would repay some of the kindness he showed me." When Summers became ill, he talked to Newton about his artistic works and the two became close friends. Summers died in August 2019. ==Music==