Like most people her age, my 12-year-old daughter, Mandy, has had her share of fixations and fascinations with popular culture. When she was 7, she was all about Disney’s High School Musical. She had posters of the movie’s stars Zac Efron and Vanessa Hudgens on her wall, and other movie paraphernalia strewn from one end of her room to the other. Then her attention turned to singer Taylor Swift. She couldn’t get enough: posters, books, calendars, and of course Swift’s songs playing on her iPod over and over. Then came Rick Riordan’s Percy Jackson book series, which assuaged Mandy’s budding interest in Greek mythology.