Chronicles of the Lensmen, Volume 1

This is the very definition of “Space Opera”. The only thing more ridiculous than the super science is the romantic scenes. This is an entirely silly book that I recommend because this is the history of SF.
It's also kind of fun and quick to read. It's available free on Project Gutenberg.
Have fun

I wonder if anyone ever counted how many times words like “violently” and “furiously” appeared in this book? Rated at three stars because it serves as an example of how NOT to write. Now I understand why Stephen King gets so triggered by adverbs. :)

Although it feels dated in some aspects, it is one of the great classics and a must read for any sci-fi fan.