The volume, which focuses on the first half of the band's career, is available beginning today (Oct. 11) via Pearl Jam's Web site.

As tipped here in January, never-before-seen images from photographer Lance Mercer form the basis of the new book "5X1: Pearl Jam Through the Eye of Lance Mercer." The volume, which focuses on the first half of the band's career, is available beginning today (Oct. 11) via Pearl Jam's Web site.

Mercer, who collaborated with photographer Charles Peterson on the 1998 Pearl Jam photo book "Place/Date," worked in tandem this time around with artist Regan Hagar, who plays in Pearl Jam guitarist Stone Gossard's side band Brad.

"Regan and I pretty much had free reign to put it together before we even showed it to them," Mercer told Billboard.com in January. "We did a mock-up, but we waited for a long time -- we went through thousands of images and various different sequences of photos."

Two photos in particular are among Mercer's favorites. "There's one where [guitarist] Mike [McCready] is dancing around in his hotel room," he said. "For me, it was one of those days where I think it was a turning point for me, because they were comfortable enough with me that I was able to just hang out in their hotel room and take pictures of them doing their everyday tour thing. There's another one where [singer] Eddie [Vedder] is playing around with the manager's daughter, and it's just really an innocent moment. I really love that shot -- they're in this hallway. Their guard was down and I was able to get some pretty spontaneous moments."

"5X1" also includes essays from fellow musicians such as Bruce Springsteen, Pete Townshend, Michael Stipe and Ben Harper, activist Gloria Steinem, director Cameron Crowe, actor Tim Robbins and surfer Kelly Slater.

Having recently completed a European tour, Pearl Jam is taking a break before resuming live duty Oct. 21-22 at Neil Young's Bridge School Benefit outside San Francisco. On Friday, the group will be honored for its contributions to the Seattle-based organization YouthCare, which assists the area's homeless and high-risk youth.