This science fiction novel from 1959 blends several themes. At the heart of the novel is a First Contact encounter with aliens called The Others. The First Contact doesn’t go well (no surprise there). A band of super secret scientists work to manipulate Earth and its colony worlds (a lot like Asimov’s FOUNDATION). A rogue billionaire threatens the entire Galaxy (shades of Donald Trump!). That’s a lot to pack into 159 pages, but John Brunner handles all of these conflicts with aplomb. If you’re in the mood for a pulpy SF novel with Big Ideas, give the The World Swappers a try.