Eclectic Readers discussion

In An Absolutely Remarkable Thing by Hank Green, April May runs into an absolutely remarkable sculpture on her way home one night. It's one of many which have just appeared across the globe. She and her friend Andy name it Carl and create a video around it for fun, but what they don't realize is they've just documented earth's first extraterrestrial encounter. Their experience goes viral, and April May gets hooked on both the mystery of the Carls and the attention her investigation is gathering. What are some things that hooked you about this book?