Knave of diamonds : a novel of suspense featuring Mary Russell and Sherlock Holmes

"When Mary Russell was a child, she adored her black sheep Uncle Jake. But she hasn't heard from him in many years, and she assumed that his ne'er-do-well ways had brought him to a bad end somewhere -- until he presents himself at her Sussex door. Yes, Jake is back, and with a load of problems for his clever niece. Not the least of which is the reason the family rejected him in the first place: He was involved -- somehow -- in the infamous disapp...