For Lewis Mumford [0] maybe "Myth of the Machine" - with his concept
of "megatechnics" - is more readable than the earlier "Technics and
Civilisation", but his earlier insights seem ever more relevant.
For Neil Postman [1] the standard reader is "Technopoly", but for me
"Amusing Ourselves to Death" is a real treat. It was literally a
description of social media and modern "performance politics" 40 years
too early.
Of Illich I've only fully read "Tools for Conviviality", which I'd say is a manifesto for Humane Technology of a kind.