The National Association of Non-principals' “Yellow Book” - already a classic on the organisation of work for the locum GP - has made the transition to the web (http://www.nanp.org.uk/handbook/index.htm). Among its 40 chapters is advice on topics as diverse as the contents of your bag to gaining entry to the NHS pension scheme. One of the main problems facing the itinerent locum is getting rapidly up to speed with whatever information system the practice uses, so the chapters on computerised prescribing, Read codes and the internet are going to be useful. The material shares the light touch of writing and presentation with its paper counterpart, but takes advantage of the potential of the web by including relevant links.