A later (set?) of chapters might just be in the 90+ scale; at that regime the characters can flit around the universe in the notional blink of an eye, even though their nanoships' velocity is only a few km/s. In my mind it'd be just a nuts-and-bolts 30's-style hard boiled detective story; but, set in the year 10^110.
Oh! Oh! And Charlie Stross would write this book for me, and it'd be a series.