3.66 stars. In this SF/fantasy "Wild Cards" story, you gradually are introduced to a benevolent but weirdly innocent (you find out why, later) character initially called the Visitor, who can (usually for a brief time) take over other people's bodies. She tries to do that only by invitation, and she can only take over your body if she or someone she's inhabiting has touched you. And often people really do invite her in: she also has a certain superpower that travels with her and is temporarily assumed by whosever body she's in.
Gradually the story focuses in on an evil pharmaceutical corporation that's trying to prevent the release of a new medicine that would hugely benefit humanity but trash their profits. They'll stop at nothing ... and they have other superpowered people like Ruby, the "Dragon," whose power is about what you might expect with a moniker like that.
It's a pretty straightforward plot, other than the initial confusing part where you're trying to figure out what this story is all about and the author keeps changing to different characters' points of view. It has some stock villains and a few more interesting and complex characters, including the assassin Ruby.
"Wild Cards" is a shared author universe set in an alternative future where an alien virus kills 90% of the people who get it, disfigures and/or gives useless superpowers to 9% (the Jokers), and useful superpowers to the last 1% (the Aces). It's helpful to be familiar with some of the other stories, but knowing that concept will see you through.