Street-surveillance technique wasn’t something you got much training in, at the Academy, not unless you looked like such good detective material that they streamlined you right into the Advanced CI courses. But Rydell had gone and bought the textbook anyway. Trouble was, because of that he knew you pretty well needed at least one partner to do it with, and that was assuming you had a radio link and some citizens going about their business to give you a little cover. Doing it this way, how he had to do it now, about the best you could hope for was just to sneak along behind her.