Hillary Clinton, through the lens

(CNN) - The photojournalist behind the iconic image of Hillary Clinton that spawned the viral phenomenon "Texts from Hillary" is releasing a book of behind-the-scenes photos of the potential 2016 presidential contender.

Diana Walker has been taking photos of Clinton for decades. Her photo essay, “Hillary,” features snapshots from November 1992, following Bill Clinton's election to the White House, through the end of Hillary Clinton's tenure at the State Department.

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The book will be organized into four phases of Clinton's time in politics: first lady, senator, her 2008 presidential campaign and secretary of state.

"From Hillary’s early days as First Lady to her time at State, Walker was there to preserve the dramatic Washington moments, the Lewinsky scandal, and the iconic time in the military cargo plane when Hillary sat in dark glasses concentrating on her Blackberry," according to a description of the book from publisher Simon and Schuster.

"Hillary allows you to share her journey and come closer to comprehending the woman behind this extraordinary public life."

Walker, a revered photographer whose career at Time Magazine spanned five presidencies, from Ford to Bill Clinton, first photographed Hillary Clinton in 1976, the same year she joined the Rose Law Firm in Arkansas.

Walter Isaacson pens the forward to the book, due out in October.