07 - Voodoo Planet by Andre Norton

In this thrilling sequel to Plague Ship, the Solar Queen finds herself unexpectedly grounded from trade, embarking on a seemingly uneventful two-year journey as an interstellar mail carrier. However, her crews curiosity leads them to the exotic safari planet of Khatka, where they become embroiled in a fierce confrontation between rationality and the dark magic wielded by Khatkas mind-controlling wizard. Join us as we delve into a world of adventure, intrigue, and the battle for autonomy. (Summary by Mark Nelson)