Definately a good start and I already like the character.
Fear of being stole from her? She is a thief. The safest place for things would be in her control I would think. And a key wouldn't be good enough if she is that paranoid. Needs a story behind it, stuff stolen in the past and such. There would probably and elaborate cache of her most valued possessions too since she loves the manuscripts. (Probably my pettiness but I like these kind of details about characters)
The rest is pretty good, I am probably picky because I like the character and want to know more. Got me hooked, now reel me in. Go to Comment
A ruby of immense size, this stone was once the eye of a deity of war. When properly commanded by long lost rituals, the huge gem will rise into the sky, glowing brightly. Visible for miles, all who look upon it in its full radiance will be filled with intense homicidal rage.