Yeah, “Time Enough For Love” ended up on that list mostly because it’s so different. That made an impression on me when I read it in high school, in the way of “Huh, I guess it’s actually possible to write a book like this”. It had a lot of interesting ideas but the narrative sprawls around pretty wildly.

Riftwar Saga basically takes Tolkien’s Middle-earth setting and mixes it with our own world’s Middle age cultures, plus magical stargates and an invasion from an another world. It’s not a ripoff in any way, it carries it own story proudly but the similarities with names from Tolkien’s works was a bit distracting at first. These were the first books I was able to read entirely in original English in my early teens.