A towel is the most massively useful thing an interstellar hitchhiker can carry. You can wrap it around you for warmth, use it as a sail on a small raft, signal for help, or even use it to avoid the gaze of the Ravenous Bugblatter Beast of Traal.
It sounds like you’re referencing — which appears to be a Spanish-language edition or adaptation of Douglas Adams’ The Hitchhiker’s Guide to the Galaxy , possibly from 2005. 2203-La Guia Del Viajero Intergalactico -2005- ...
The answer to life, the universe, and everything is 42 . Don’t ask what the question is — no one knows. A towel is the most massively useful thing
These two words are the most useful thing you can remember. They appear in large, friendly letters on the cover of the Guide. signal for help