For those who find the full 63 hours daunting, the abridged version narrated by the late Edward Herrmann is highly regarded for its performance quality, even if it cuts significant portions of the text.
For 50 pages of print (roughly three hours of audio), the mysterious hero delivers a monologue outlining the entire Objectivist philosophy. It is a marathon of abstraction, a legal brief for capitalism, and a sermon against the "looters." audiobook atlas shrugged