Formal third-person past: Dr MARK DENNY was born in England in 1953. He trained as a theoretical physicist, and has worked in academia (Edinburgh University and Oxford University) and industry, spending twenty years as a radar systems engineer with several multinational aerospace companies. He retired in 2002 to western Canada, and became a popular science writer. He has written a dozen books, all published by eminent university presses, on many different scientific subjects--providing thoughtful explanations of how things work for curious readers. Subjects covered include aerodynamics, classical mechanics, civil engineering, meteorology, sports science, biomechanics, geodesy, power engineering, and climatology. Informal first-person present: I live in a small village on the southern tip of Vancouver Island. I have a wife, a dog, two cats and a hen. I brew beer, write physics papers for fun (yes, fun--you have a problem with that?) and popular science books for both fun and royalties. Many reviews of my books are on Amazon.com and Goodreads. Some of these reviews are reproduced here, as sidebars on each book page. If you have any helpful comments, corrections, or suggestions for further titles, you can reach me at mdenny53@gmail.com. The header image for my website is of a musket being discharged. The physics of musketry is interesting, and is discussed in my ballistics book. For a given barrel length, there is an optimum powder charge. Gunpowder smoke is Napoleon's "fog of war". The invention of rifling, bullets (to replace musket balls) and smokeless powder changed the way battles are fought.