Highbridge Audio - Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products.. HighBridge. HighBridge is a leading spoken audio producer that was started to produce and distribute recordings of Garrison Keillor’s A Prairie Home Companion.Since then, the company’s spoken audio catalog has expanded to include New York Times bestselling fiction and nonfiction, Oprah’s Book Club titles, National Public Radio compilations, and more.. The Dark Empire audio drama was a full cast audio adaption of Dark Horse Comics' Dark Empire comic book series. It was adapted by John Whitman from the source material by Tom Veitch. It was directed by Arthur G. Insana and featured parts of composer John Williams's classic score along with.