Flesh and Metal: Book One: The Saren Incident

Set in an AU where the Geth came to Humanity's aide against the Turians during the First Contact War, Humanity takes a different path. But some things stay the same. Commander Shepard is put forward as the candidate for the Spectre program, he just happens to have an AI in his head. Humanity does not like Quarians, likes the Asari and Salarians and Anderson needs a drink. Or ten.