<human>: I was with a friend wandering around a used book store I frequent, and I suddenly remembered a book I had been dying to read - the curious something something of the dog something is all that came to me. like someone threw out a fishing line and hooked me in the cheek, I turned and was pulled towards the closest shelf, where the exact book I was looking for jumped out at me - "the curious incident of the dog in the night-time" by mark haddon. I remember sharing the back seat of my college roommate's buick regal with it for forever, that red cover staring me in the face, but it never enticed me enough to ask to borrow it. Today, though, I needed something new to read, and I figured now was as good a time as ever.

There were several copies on the shelf, and I grabbed the one that looked the most beat to shit - this book store prices their books by condition, so getting one that's a little rough around the edges gives you a good chance to save a few bucks. i opened it to the page where this store normally lists their prices - those first few blank pages - and was confronted by a note left by a previous owner to her dead sister.

i read through it quickly and the only words i could muster were 'what the fuck.' i showed my friend and she was just as perturbed by it. i could have easily just put it back and gotten a different copy of the same book, but something about it refused to let that happen. i bought it and the lady at the front desk skimmed right over the notes (one in the front, one in the back) and didn't notice a thing. the book has been in my possession ever since and it's creeping me the fuck out.

Can you summarize the given text in a few sentences?
<bot>: found a book with a note from a girl to her dead sister, some sort of angsty poem too. afraid someone is going to crawl out of my television and kill me.