Assault on the Gods - Stephen Goldin - Bog

Starship captain Ardeva Korrell is used to fighting prejudice, both because she's a woman in what's normally a man's line of work, and because she's from a world with a misunderstood religion. But now, on a trading mission to a backwater planet, she finds herself with another kind of fight on her hands. She and her small crew must battle an army of robots and defeat the tyrannical, god-like beings who have enslaved the native population. The task before them is straightforward: to storm the gates of Heaven itself!