First of all, I love the amount of research put into this book. I'm not well-versed in the subject of conjoined twins, but when reading this book, I feel like I learn facts not just feel the emotional rollercoaster that is Grace.
Grace is the introvert while Tippi is the extrovert. These two girls, who are identical twins that never quite separated at birth, are nearly almost complete opposites. But they love each other anyway, and they know each other better than anyone else. Their relationship is truly fascinating, and throughout the book, they lived their teenage years together. They went through everything together, facing rough topics like death and separation. And darn, when Grace talks, I gain another perspective and see things in a much different light.
I knew the ending before I read it. I was tipped off by the illustrations that are made on the first page of every single new part of the book. Besides, the title should probably tip off most readers, but yes, the ending is truly heartbreaking yet also uplifting. (It isn't so emotional for me, because I have a weak connection to a certain character. Therefore, I did not cry.)
The free verses are pretty, and the titles are unique. But as a seldom reader of poetry, I can't judge them. But I can tell you all that they flow without a hitch, and I understood the story/plot quite easily as if I'm reading a novel with heavy dialogue and wordy prose.
The plot is very active, but it is Grace (and Tippi) who drives the plot and makes the decisions. The story is never boring, and Grace has so many words to (internally) say.
In conclusion, ONE, which is YA Contemporary, is a beautiful and emotional tale. It is for fans of The Sister's Keeper, and it's ultimately a tale of two sisters told in stanzas and lines. Though they may seem to be abnormally joined together, they truly are soulmates.
Rating: Four out of Five