Orion’s Arm and the Lensmen

[Avengium]

https://en.wikipedia.org/wiki/Lensman_series
Sounds very interesting for lovers of fantasy and mythology like me 

With vintage book covers:
https://www.goodreads.com/series/49225-lensman

I like the internet archive of Brewster Kahle.
https://archive.org/details/e-e-doc-smit...28v2.0%29/
this has the six books
01: Triplanetary
02: First Lensman
03: Galactic Patrol
04: Gray Lensman
05: Second Stage Lensmen
06: Children of the Lens