So glad you have 'fessed up on the main thread, Psycho
This has been on my "want-to-read" list for aaaaaaages so I was so pleased to get it, and it was a really, really good read.
I was particularly impressed at the way the author makes Tess a believable teenager. Lesser writers might have been tempted to turn her into a complete saint, but I wanted to slap her for most of the book - the monumental self-obsession of a teenager focused through the prism of imminent mortality is a pretty lethal combination.
Worth it for the last 50 pages alone - I thought this had the most incredible ending of any book I have ever read and I was sobbing buckets.
I was delighted to receive this book, as I'd been interested in reading it for a while, but was concerned it might be too childish or too mawkish. But it was neither.
The ending was really moving. All the way through I wondered how the author was going to tackle the inevitable death scene - and she handled it really really well. The language was beautiful, without being overly sentimental.
Tessa was no saint, in fact she was often a total PITA, but the book really brought home the utter unfairness of her diagnosis, and the tragic waste of such a young life.
I looked at this and groaned slightly (sorry) as I'm not a fan of mislit, but this was strangely uplifting. I loved it.
It was very simply written and, as you say, the main character was sometimes a PITA, but the story was totally believable. It was sweet without being saccharine; sad without being morbid. I read it in one sitting.