David Gunn
US-based according to SFE3 (which suggests that the name may be a pseudonym), but UK-based according to <a href="https://www.penguinrandomhouse.com/authors/74827/david-gunn/">Penguin Random House</a>. The <a href="https://davidjgunn.com/author/">New Zealand-based non-fiction author David Gunn (b. 1967)</a>, whose photo is used by Fantastic Fiction, is apparently a different person.