The story is about a guy who comes over all stalkerish when he meets his creative writing teacher, before being convinced to back off. Once he has backed off, however, she comes over all stalkerish (how can he drop her that easily?), and we see her display the sort of behaviours that he displayed in the first half of the book.
I'm sorry, but I didn't get it. I'm not sure what the story is trying to be. Is it a thriller? Well it's not very thrilling. Is it a sort of love story? Hardly. Is it trying to be amusing? Beyond making me smile once or twice, not really.
In addition, I don't claim to be an expert, but it's my understanding that stalkers (that display the behaviours shown here) don't back off that easily, and I'm not altogether sure it is something that should be made light of, even if they did.
Finally I'd like to point out it costs you 70p. It'll keep you diverted for a while, and the price is pretty cheap, but part of me thinks you get what you pay for in life.