It's called "The Earth Hums in B Flat" and it was really good
and only a pound!
By Marisa (I think) Strachan - it's about a young girl growing up in a little village in Wales, and all the family secrets. It sounds a bit drab but the way it's written is really good - the plot has loads of little clues and drops hints, and you get loads of "Ooo" and "AHA!" moments, and then something else turns out to be true. I really enjoyed it anyway. It reminded me a bit of "A Boy's Life" somehow but it's nowhere near as big, and there's no supernatural element, just the girl's imagination.