My first thought was this book series that speculated on time-traveling humans interbreeding with aliens with a take on the mythology of elves and dwarves. htt

My first thought was this book series that speculated on time-traveling humans interbreeding with aliens with a take on the mythology of elves and dwarves. https://en.wikipedia.org/wiki/Saga_of_Pliocene_Exile https://en.wikipedia.org/wiki/Saga_of_Pliocene_Exile