Robert Greenberger has 2 audiobooks on Listento.it, narrated by 2 narrators. The most-rated is The Children of Tomorrow.

Born in the blazing crucible of war, but sworn to fight for peace, the mysterious obsidian aviator known only by the code name Captain Midnight flies again! An ace pilot, super secret agent, and astounding scientific genius, the heroic Captain Midnight ruled the radio airwaves and starred in comic books, film serials, and a classic television series. Now, when we need him most, he has returned, along with his legendary Secret Squadron, to battle spies, saboteurs, and the mercenary armies of the evil warmonger Ivan Shark and his delectably deadly daughter, Fury. Featuring New York Times best-selling aviation novelist John J. Nance, the Captain Midnight Chronicles boasts a squadron of talented contributors, including Stephen Mertz, Robert T. Jeschonek, Mark Justice, Chuck Dixon, Robert Greenberger, Trina Robbins, Tim Lasiuta, Win Scott Eckert, Howard Hopkins, and Christopher Mills.
©2010 Moonstone Books (P)2018 RadioArchives.com

The race is on.... Meredith Gale has to make contact with the Architect before the Adversary’s agent, the transformed Abernathy, reaches her and ruins the millennia of planning designed to save the Earth. In order to accomplish this, she and her ragtag band of friends have to unify the scattered survivors of the multiverse to oppose the Adversary. Along the way, new allies will be made while new opponents do their best to stop her. If she fails, not only will the last of humanity be wiped away, but the Earth won't survive the collapse of the universe. All the questions get answered in this final installment of the acclaimed This Alien Earth series.
©2020 Aethon Books (P)2020 Audible, Inc.