This is often described as Clarke’s non-sf novel, but it has a very similar feel to some of his hard sf. There is the same world building and sense of wonder inspired by science — but the world he brings to life here was real and recent history. For this novel is a fictionalised account of the development of Ground Control Approach radar during the second world war, and Clarke draws upon his own experience of working on the project to safely talk down aircraft by radar.
It might sound dry, but it isn’t. Clarke does a fine job on showing both the the technology, and the people who created the technology, with the interplay between different personalities, and the little and large incidents that make up life in a developmental project. The main character’s not always that likeable a person, but in a way that makes him a believable viewpoint character rather than a stock hero. There’s plenty of dramatic tension, and lighter moments as well, with both clearly being drawn at least in part from Clarke’s own experiences. Glide Path is well worth a read for both sf readers and WW2 History buffs.