I use this phone for reading ebooks on the go. As far as I know there isn't a native ebook app that works with this phone. At least as far as I know, I looked and didn't find anything. Then found Bookworm. And I also use Opera Mini for the browser.
Bookworm allows you to upload epubs and read them online. I personally think its a great site and fits my needs perfectly.
http://bookworm.oreilly.com
Measuring 4.24 inches long by 2.16 inches wide by 0.51 inch thick and weighing 3.16 ounces, the Vu is fairly light for its size thanks to its all-plastic casing. 3-inch
diagonal touch-screen and supports 262,000 colors and 240x400 pixels.
It works quite well as a small mobile ereader when you need it. Just wanted to pass this on for all the LG phone people out there.