iBooks interactivity offers potential for publisher product placement

On FutureBook, Richard Stephenson has a brief piece looking at the interactivity now possible in iBooks. Since iBooks 1.5 supports Javascript, this means that e-books can take upon themselves abilities formerly associated with stand-alone appbooks. Stephenson uses the example of the Beatles Yellow Submarine iBook, available for free from the iBookstore, which uses embedded Javascript [...]