You feel slightly nostalgic about that era, which you feel was relaxed than your present life. Indeed, those were the days when you could spend a large part of your time learning new skills. These days, the demands of your job, the busy social life in New York, and your new alter-ego have meant that you have little time to acquire any new skills.
However, whenever possible you try to learn something from books, and you have collected quite a number of them over the years.
One of the shelves is dedicated to your main interest these days, which relates to…