To the customer in conversation one, I'd reccomend "The First Day of the Rest of My Life" by Cathy Lamb.  It looks like it has the same introspective feel and a similar theme of self re examination. It was also reccomended by The Three Tomatoes Book Club, so I assume it would be a good book club selection. Finally, the author is a New York Time's bestseller and the customer mentioned that she like popular books.