This was the best of the Galactic Empire books, but I couldn’t get past the fact that I found the story totally unbelievable.
A guy from Earth gets transported many millennia into the future, where he finds an Earth that’s a backwater outpost of the Galactic Empire (which we don’t know much about). He’s then made super smart. He and several others discover a plot to destroy the Empire. Earth is de facto run by a council of elders who believe that Earth was the birthplace of mankind. These elders plan to destroy the empire with biological weapons. Luckily, our newly smart guy and his friends foil the plot.
Setting aside the time travel elements, I found it hard to believe that such advanced people wouldn’t have better methods of recording events, such that they’d entirely forget that Earth was the original home of humans. Additionally, like much sci-fi it assumes huge advances in physics and chemistry but complete stagnation in biology.
The books in this series are underdeveloped. The Empire isn’t really explained (I believe the Foundation Series will rectify this) and so the events have little or no context. I’m happy to be moving on to the Foundation Series.