King's new novel, Justice Hall, is near the top of my book pile, and Linda suggests revisiting this delightful 1999 story in preparation.
Mary Russell is a great achievement, a completely convincing young counterpart to a aging but still-vital Sherlock Holmes. She's young, but wise for her years. She's rich -- but can't get at her money. She's the orphan daughter of an American Jew. This novel, presumably born by excising an overlong chapter from King's stunning The Beekeeper's Apprentice, revisits the earliest years of the Holmes-Russell partnership, and the old man and young student flee the perils of London for a few weeks of running errands for Mycroft and Her Majesty's government.