Before revision: Douglas Adams' SEP Douglas Adams' 1982 novel Life, the Universe and Everything (in The Hitchhiker's Guide to the Galaxy comedy science fiction series) introduces the idea of an "SEP field" as a kind of cloaking device.
After revision: Examples Douglas Adams' 1982 novel Life, the Universe and Everything (in The Hitchhiker's Guide to the Galaxy comedy science fiction series) introduces the idea of an "SEP field" as a kind of cloaking device.