I've recently been reading Ben Bova's The Story of Light. It is not science fiction, but more of an ambling through science history, discussing the development of humans' interaction with light. It is a very interesting read, including a lot of science and research history, and also the importance of light in humankind's mythology, including the various mythologies of science fiction.
It's a good read, even though it has taken me some time to get through it due to a recent busy schedule. It is about 400 pages, and while some of it is concerned with technical things, it is not an overly technical read.
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