Before Pearl Jam's new album, 'Backspacer,' comes out on September 20, the band is previewing the artwork with an online scavenger hunt. Featuring images from legendary cartoonist Tom Tomorrow (of 'This Modern World' fame), nine different album-related pictures have been spread out across the Web, including the exclusive one below. Collect them all, the band assures us, and you'll get a pretty sweet surprise. So what are you waiting for? Click our puzzle piece below and get to finding the rest!