Sunreach

In this Skyward series novella by Brandon Sanderson and Janci Patterson, the inhabitants of Detritus face an emerging threat as a planet-destroying Delver appears in the sky, prompting urgent efforts to understand and confront an alien species known as the Taynix. With humanity's survival at stake, FM, Jorgen, and Rig must collaborate to unlock the powers of the alien Taynix and awaken a mysterious being, all while trying to rescue a stranded ally and thwart the plans of an oppressive galactic regime.