The latest non-fiction book-app using a timeline interface as an alternative to page-turns is littleBIG History. Released as a £2.99 iPad app by publisher VariaMedia, it promises “a revolutionary interactive timeline that lets you explore world history on an unprecedented scale – from the first miliseconds after big bang to the present and beyond”. Revolutionary? We’ve seen timelines used before – for example in historian Dan Snow’s WOrld War 2 app. Even so, littleBIG History looks worth investigation.