This is a story about an emotionally isolated woman finding a cause. It's a slightly different novel than I expected, since I thought it would be an extended exploration of a wrecked spaceship, but that is not the focus at all. Still, like most of Rusch's work, it hooked me and drew me strongly on to find out what happened next (with a slight trip over the part structure, which seems to reflect an origin as a short story or novella which has been added to).There is a touch of plot convenience, in that the woman who discovers the wreck has a history with the valuable technology on board and a genetic 'marker' allowing her to deal with it - not to mention a crew member who just happens to be an ex-scientist who researched the technology and is obsessed with it, and I found the rather variable nature of how much oxygen each diver might have with them confusing and two of the deaths felt forced - one by strange lack of oxygen, and the other because it required two groups of people keeping secrets from each other to happen, but overall I enjoyed the book.
