Perhaps his most famous work, 1962's The Ipcress File was turned into a Bafta-winning film starring Michael Caine, and was re-made as an ITV series starring Peaky Blinders actor Joe Cole four years ago. A keen illustrator, he was also responsible for more than 200 book covers, including the first UK edition of Jack Kerouac's On The Road. In 1940, he saw his mother's client - Anna Wolkoff - dragged off by the British Security Services and accused of being a wartime Nazi spy. In 1977, he published Fighter - a non-fictional account of the Battle of Britain, which Hitler's former armaments minister, Albert Speer, described as "excellent". However, there was a revival of interest when, in 2017, the BBC screened a dramatisation of SS-GB, nearly 40 years after the publication of the novel on which it was based. And, in 2022, The IPCRESS file - the book that started it all - was remade for ITV, starring Joe Cole, Lucy Boynton and Tom Hollander.