Every week a Guardian Money reader submits a question, and it's up to you to help him or her out – a selection of the best answers will appear in next Saturday's paper.

Any answers?

We have a lovely independent bookshop in our town which I try to support. Amazon, though, is so much cheaper – on a recent purchase of three books I saved more than £13. Am I alone in wrestling with this? And at what price differential do other readers go online?