.27 is a number Ruby hates. It’s a number that marks the percentage of the population that has survived. It’s a number that means she’s one of the “lucky” few still standing. And it’s a number that says her father is probably dead. Against all odds, Ruby has survived the catastrophic onset of the killer rain. Two weeks after the radio started broadcasting the warning, “It’s in the rain. It’s fatal and there’s no cure,” the drinkable water is running out. Ruby’s left with two options: persevere on her own, or embark on a treacherous journey across the country to find her father-if he’s even still alive. H2O is a post-apocalyptic novel, narrated by a 15year old teen, Ruby, in the aftermath of a global pandemic caused by contaminated rain water. Firstly, the death toll rises high because people don’t realize it’s in the water. Ruby herself survives only thanks to the advice of her elders. As the day passes, people keep dying and she and her stepfather are forced to look at options for food and water. Later on, she sets out to find her dad, and meets a guy from her school, as well as a kid, and together they travel to London. When she finally reaches settlement, she recounts the story and this is the narrative we hear. The story of H2O, while pretty good and thought-out, fails due to bad writing. Ruby as a narrative, is kind of a headache, and she uses exclamations way too much and quite a lot of capitals too. It’s very scattered, the voice and the thoughts, and it sometimes took me several tries to get the meaning of the sentence. It would really have been more fun to if it wasn’t trying to be an amateurish teenage diary of the apocalypse. Secondly, Ruby, as a character comes across as very shallow and vain at times, and in the face of a drought-like situation, I doubt that piling on makeup would be your first priority. She is the antithesis of preparedness for any sort of disaster, and maybe the book wanted to show how a common person would get through it, it makes it all seem like happenstance then. Also, she makes various rash decisions, which make me wonder how she did not end up being rained on. Overall, it was okay, but difficult to read through because of the writing. Might read the sequel but don’t have high hopes for it. 2.5 stars Received an ARC from Sourcebooks through Netgalley. This in no way affects my opinions or review.