Once upon a time, there were four girls and then one of them drowned. Was it suicide or was it murder?  My Thoughts  Thank you so much to the author, NetGalley, and Sourcebooks Fire for a copy of this ARC in exchange for an honest review. I went into this book completely blind and was so surprised by this unique concept and how much I enjoyed this slow burn thrill!  So this book was definitely a slowwwwwww burn and at first I was hesitant to continue the read. I was very overwhelmed by all the characters and their conflicting stories and I just didn’t know what to think. It was…