Fantasy author Sir Terry Pratchett died on 12 March 2015, aged 66.
Best known for the Discworld series, Sir Terry wrote more than 70 books over his lengthy career.
"The world has lost one of its brightest, sharpest minds," said Larry Finlay of his publishing company, Transworld.
"As all who read him know, Discworld was his vehicle to satirize this world: He did so brilliantly, with great skill, enormous humour and constant invention.
The Discworld series - which started in 1983 - was based in a flat world "perched on a tortoise's back". By 2013, he had written more than 40 instalments.
Radio New Zealand interviewed the author on a couple of occasions. Lynn Freeman spoke to Terry Pratchett for Nine to Noon in 2010, after he was diagnosed with a rare form of Alzheimers Disease, and had spoken out about assisted death.
Bryan Crump spoke to the author about his fascination for magic, philosophy, physics and turtles in 2011.