Balint Stephen Biro (Budapest, October 6, 1921 – July 4, 2014) was a children's author, artist and illustrator. He received his education in Budapest and London. Originally a native of Hungary, his studio was located in Amersham in Buckinghamshire.
From an interview in the early 1970s: "My writing is mainly concerned with my vintage car "Gumdrop." It was four years ago that my publishers suggested that it was about time that I wrote a book for children and not merely illustrate one; and I decided on Gumdrop as the main character.
"I write so as to give my alter-ego a good chance for drawing pictures, though I find that the story I invent tends to run away with itself, leaving me, the illustrator, behind! Each story tends to be based on personal experience and, equally, each tends to grow out of that into the imagination. Each book seems to take a few months to gestate, and then I write it in one long day (or night)."
In the 1950s and 1960s Val Biro illustrated many book covers for famous authors such as Nigel Tranter and Nevil Shute (Requiem for a Wren, Round the Bend, The Far Country and Beyond the Black Stump). For C.S. Forester, publishing with Michael Joseph, Biro made cover illustrations of several first editions: Mr. Midshipman Hornblower, Lieutenant Hornblower, Hornblower and the Atropos, Hornblower in the West Indies and Randall and the River of Time. He also illustrated covers for Radio Times.