Book excerpt: Twilight Sparkle might be back in Equestria, but she's still thinking about her human friends at Canterlot High . . . When DJ Pon-3 overhears the Equestria Girls singing, she suggests that they start a band in time for the Spring Fling! But practising is hard when the girls have to find instruments, deal with a rival band and look after a whole herd of hamsters . . . Can they work together to get the band ready in time? When you're playing with your very best friends - music is magic!