The Einstein Nexus: Book 2 A Novella The experiments in time shifting had been successful. But an accident created an ever-expanding bubble of time which threatened to send the world back to the big bang. With the professor detained, Grandpa Anderson and the boys were the only hope. The Einstein Nexus: Book 2 is the second novella about time travel and teenage boys in the Ancient Earths series. See the author's website for more. Hard Science Fiction - Old School.