Oh boy! you're going to love Julian May! She's my favourite author and her two most famous series (Saga of Pliocene Exile and Galactic Milieu) are utterly incredible. They form a sort of Ring Cycle, so you can either start with The Many Coloured Land (SPE) or Intervention (GM) and you'll end up in the same place.

I heard that Amazon were considering filming SPE but went for The Wheel Of Time instead. There's some great concept art here.

Edit: link doesn't work as a shortcut.

https://manycolored.fandom.com/wiki/Saga_of_the_Exiles_(adaptation_project)