David MacKay spent £10,000 financing the publishing of his own book, “Sustainable Energy – Without the Hot Air”. It was picked up by the Boing Boing blog among others, and became a bestseller almost overnight. The plaudits earned from all quarters are deserved – this is a terrifically readable book which breaks down the complex and sometimes confusing issues around sustainable energy into human-readable concepts and numbers – and does so in a greatly entertaining way. The book is freely available in digital form from the website http://www.withouthotair.com/ so if you have an e-book reader get downloading. For the rest there are paper versions in the shops. A breath of fresh air.