Star-Begotten

In this book strange beings walk the streets of England. They are not strange, however, in an obvious external way, and it is some time before anyone becomes aware of their presence. Then Mr. Joseph Davis, author and student of human history, encounters traits in some of his acquaintances that cannot be explained by known laws. Driven by his curiosity to wrestle with the puzzle, he tracks down a series of apparently unrelated clues and produces at length a convincing, though staggering, conclusion.