Carstensen is a Danish born Kiwi and also has Canadian citizenship. He is an English teacher by profession, now retired and writing fiction and fishing. Resides in Tauranga and is a member of Tauranga writers. Apart from listed publications, his short stories have been published in various New Zealand and Australian literary journals and magazines. His story Manhunt, published in Mindfood magazine was the most read story on their website in 2025. See  Mindfood also for Slumming It.

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