Dorothy Gentleman (Book 1)
Near the topmost deck of an interstellar ship, Dorothy Gentleman wakes up in a body that isn't hers just as someone else is found murdered. As one of the ship's detectives, Dorothy usually delights in unraveling the schemes on board, but when she finds that someone is purposefully deleting minds from the Library, she realizes something sinister is afoot. Whatever it is, Dorothy intends to solve this case. Because someone has done the impossible and found a way to make murder on the Fairweather a very permanent state indeed. A mastermind may be at work - and if so, they've had three hundred years to perfect their schemes.