Imagine Black Sabbath and Led Zeppelin colliding in one room — and someone actually hit record.In this episode highlight clip, Denny Somach, author of Get the Led Out: How Led Zeppelin Became the Biggest Band in the World, shares the incredible story of the jam session where Geezer Butler played with Robert Plant, John Paul Jones, and Tony Iommi — a moment fans would consider impossible… except it happened. The musicians even jokingly dubbed it “Black Zeppelin.”Here’s the twist: the session was recorded, but Geezer doesn’t have the tape. Somebody does. And after all these years, it could still surface.Was it heavy? Was it bluesy? And could rock’s ultimate lost collaboration someday leak out? This is the story of one of the most fascinating missing recordings in rock history — the album that exists, but nobody can hear.Listen to Episode 357 -Led Zeppelin: The Band That Ruled the World🛒 Old Glory - Iconic music and sports fan merch💰 Get 15% OFF | Promo Code: BOOKEDONROCKhttps://oldglory.com/discount/BOOKEDONROCK----------Booked On Rock is part of The Boneless Podcasting Network BookedOnRock.com The Booked On Rock Store The Booked On Rock YouTube Channel Follow The Booked On Rock with Eric Senich:BLUESKYFACEBOOKINSTAGRAMTIKTOKX Find Your Nearest Independent Bookstore Contact The Booked On Rock Podcast: thebookedonrockpodcast@gmail.com The Booked On Rock Music: “Whoosh” by Crowander / “Last Train North” & “No Mercy” by TrackTribe