Although I had made all this money with Eye of the Needle, I was very worried that I might not be able to do it again. It happens to quite a lot of writers. They write one terrific book and then the next one is not so good and doesn’t sell quite so well, the third one is not very good and they never write a fourth. I was very conscious that that might easily happen to me, and so I worked very hard on Triple, which was my next book, to try to make it as exciting as Eye of the Needle.”