The book The dangerous Days of Daniel X takes place in cities all over the Earth and other planets. The beginning of the book starts off with him traveling around the United States but after he tracks down alien Number 3 the setting changes to outer space. First he ends up on his home planet which is a desolate wasteland on the surface and a rickety slum underneath. But parts of the planet are still intact and are beautiful. Towards the end of the book the final battle is fought on Daniels home planet’s surface.

The book takes place in the modern 21st century and it spans over several years. Overall it is an interesting book which isn't confined to one setting and time.