There are a few sophisticated portable speakers out there, but Targus keeps it simple with its upcoming Portable Speaker Book. The device features a 3.5 mm audio input, which means you can connect it to an iPod or a notebook. Powered by four AAA batteries for use anywhere, the device uses NXT’s Balanced Radiator (BR) technology to boost sound dispersion and frequency response.

The Targus Portable Speaker Book will hit the market this summer, but we have no idea on how much this will cost. I bet it isn’t so expensive.