This book was available through the local library as an ebook. It was published in 2008 and won the prize for a history book in the Montana New Zealand Book Awards The writer is a law professor at Wellington University.
It covers the buying and selling of Maori land by the government through the dates mentioned. I particularly found reading about the process and how it was supported by legislation interesting and I think other cadastral surveyors may find it interesting too. Its an easy read.