From today you can get a new version of Facts are Sacred, developed specially for iPad. It has all the visualisations and text from the hardback version but with lots more. This is a book you can interact with.

It allows you to:

• Watch films on the practice of data journalism, featuring contributions from David McCandless and others, the history of data journalism and how data was used in reporting on the Olympics.

• See how rioters 'commuted' into trouble hotspots in the UK in 2011

• Explore the data that came out of the 2012 US election
• Find out how to track a hurricane

• Engage with interactive elements that show you what the world was like when you were born, or how rumours explode and are denounced on Twitter
• Get the inside view on how journalists dealt with the enormous amounts of data contained in the WikiLeaks information

• Buy it from iTunes
• Buy the hardback - at a discount