Fool's War — Sarah Zettel

Four centuries after humanity has colonized the galaxy, information freight companies are used as an alternative to electronic communication. On one of her frequent trips into deep space, Katmer Al-Shei, owner of one of the smaller information companies, is accused of smuggling artificial intelligence. When Al-Shei tries to clear her name, she uncovers conspiracy after conspiracy, all set against the backdrop of a looming war.