Fan mail that warms my heart

Back in the day I used to get lots of letters and lengthy emails from fans of my books. That's changed with social media, as most of you now contact me via Facebook or Twitter, where your messages tend to be more truncated. But I do still get the occasional old-school letter or long email, and one was sent to me a few months back by a Mum of a young boy who had just discovered the joy of reading. It's the kind of email that reminds me, on my glummer days, why I became a writer and how important ...