Brandon Sanderson Skyward Series 5 Books Collection Set (Starsight, Cytonic, Defian)

In Sunreach, after a planet-destroying Delver suddenly appears in the sky of Detritus and vanishes just as suddenly, FM knows that the last free human society got lucky. Her Skyward Flight companion Spensa figured out how to draw this Delver away, but it won't be so easy next time. Humanity has to be prepared . . .

All her life, Spensa has dreamed of becoming a pilot. Of proving she's a hero like her father. She made it to the sky, but the truths she learned about her father were crushing. The rumours of his cowardice are true - he deserted his flight during battle against the Krell. Worse, though, he turned against his team and attacked them.

Spensa's life as a Defiant Defense Force pilot has been far from ordinary.She proved herself one of the best starfighters in the human enclave of Detritus and she saved her people from extermination at the hands of the Krell - the enigmatic alien species that has been holding them captive for decades.

Spensa's world has been under attack for hundreds of years. An alien race called the Krell leads onslaught after onslaught from the sky in a never-ending campaign to destroy humankind. Humanity's only defense is to take to their ships and fight the enemy in the skies.

Defiant:

Spensa made it out of the Nowhere, but what she saw in the space between the stars has changed her forever. She came face to face with the Delvers, and finally got answers to the questions she's had about her own strange Cytonic gifts....