Joan Aiken (1924 - 2004) was a prolific and wide ranging author, and did a lot to support the development of the Puffin Club. The Joan Aiken website is wonderful with lots of biorgaphical detail and useful sections giving orders of the books. This site is also good for which short stories were published in what. I also enjoyed looking through this which gives an idea of earlier life alongside a varity of pictures/documents including some lovely examples of very early writing.