Discover is an iPhone and iPod Touch app that let you transfer files between iPhone/iPod Touch and PC so that you can store any well known files in your iPhone and iPod Touch. To use Discover your iPhone or iPod Touch must have connected into same wirelesss network and a web browser to transfer files . As for me, it is the best way to read PDF files especially written in my native language in iPod Touch.
You only need to point to your iPhone/iPod Touch IP address with 8888 port in your browser and you need to open Discover app in your iPhone/iPod Touch as well at the same time. And you can start transfer your files.