A few years ago I took my daughter to a literary festival called EpicFest in uptown Charlotte. This was yet another one of those events where I used my sweet, accommodating daughter as an excuse to go and hear one of my favorite children’s authors speak. Lauren Oliver has written many books I’ve enjoyed, as well as one adult novel that confused me a little bit so I’ll probably need to read it again. I’m mostly drawn to her young-adult novels such as Panic, Vanishing Girls, Replica, Before I Fall (which was adapted into a film this past year), but I picked up a copy of her middle-grade novel, Liesl and Po,  for…