We Met The Space People (1959) - The charming narrative of two Earth sisters who meet up with two Space Brothers in a St. Louis, Missouri, coffee shop - and the message they shared with Earthlings. Unlike the more aggressive aliens of later decades, they wait until the third date to take Helen on a ride to the mothership. There she learns that the aliens have one-piece uniforms that 'feel like satin,' speak a Universal Language, and play a game like shuffleboard when off-duty. The 14 page pamphlet can be read at the Internet Archive.
“World War III is a guerrilla information war with no division between military and civilian participation.” — Marshall McLuhan, from Culture Is Our Business, 1970