skc73 's review for:

A Deepness in the Sky by Vernor Vinge
4.0

A little more ornate than Fire Upon the Deep. Not as satisfying in its structure, but almost grander in scope. Three povs - emergents, the Qeng Ho, and the Spiders (aliens living on the on-off planet). Politics, war, power converge on the encounter between these three povs. Emergents enslave the qeng ho via "focus" - a neurovirus that enslaves them for heightened intellectual work.

Ending:
Anne Renault - a focus - is freed by Fan ??.
One of the spiders who turns upwards towards the deepness in the sky, while all others focus on the deepness of the earth, figures out how to take control of emergent tech as the invaders plan out a Friedmanesque attempt to use catastrophe to gain control over the spider species. He grounds the Invisible Hand, a huge warship. The wreckage becomes basis for new tech understanding and development.

My understanding is partial in all of this. The names, details were so ornate I found it hard to follow. Requires a second reading to take in the full scope.