Never-before-seen photos show candid moments with some of rock 'n' roll's biggest stars

As both a sports and concert photographer, Michael Zagaris might be a bit of an adrenaline junkie.

"When you come on to the field, you feel not only the eyes of the people; you feel the energy in every molecule of the body ... The same with a rock and roll show," he recently told Business Insider.

In his new book, "Total Excess," Zagaris holds nothing back, sharing all of the gritty details of what life was like for bands like The Rolling Stones, Led Zeppelin, and The Who in the '70s, when they were at the top of the world of rock 'n' roll.

The photos are also appearing in a gallery show at Milk Gallery through December 18. They show a previously unseen behind-the-scenes look at what it's like to be a rock star, from both the front of the stage and behind it.