This book was the first one I had read by these authors and loved it. Its starts with an seemingly innocent experiment. Just answer a few questions presumably automated and anonymous. Then it expands into a more complicated situation leaving you guessing who can be trusted. Every chapter has you wondering how far the experiment will go.it also does a great job connecting with the readers and making you think about what you would do if you were in that scenario? What answers would you give to the initial survey? How easy would it be for you to be an anonymous girl? This book had great suspense and did a great job keeping you guessing. the next step a character was going t ok take was never predictable. Its premise felt fresh and still relatable. I really liked it.