Oh my! It took me a few more days to get round to than I intended, but I've just read 'The Eight People Who Murdered Me (Excerpt from Lucy Westenra's Diary)' by Gwendolyn Kiste, and it is so good! Lovely content, which reminded me a little bit of Aickman's 'Pages from a Young Girl's Journal' (except with a massively better pay-off for the female character), but really standing out for its clever and very effectively-applied structure. You can bet your life I will be looking into more of what Gwendolyn has written!