This is all three books in NK Jemisin's The Broken Earth Trilogy. It would be a great gift for any occasion and includes The Fifth Season, The Obelisk Gate, and The Stone Sky.
Check out this booktube review of the first book of the series, The Fifth Season: https://www.youtube.com/watch?v=FqxwhlcsLkU
This is the way the world ends for the last time...
A season of endings has begun. It starts with the great red rift across the heart of the world's sole continent, spewing ash that blots out the sun. It starts with death, with a murdered son and a missing daughter. It starts with betrayal, and long dormant wounds rising up to fester.
This is the Stillness, a land long familiar with catastrophe, where the power of the earth is wielded as a weapon. And where there is no mercy.
The Broken Earth trilogy
The Fifth Season
The Obelisk Gate
The Stone Sky