In 1998, President Bill Clinton got into quite a bit of trouble for getting a little too friendly with his intern Monica Lewinsky.

It seems like the scandal finally blew over: Hillary Clinton ran for president and is now Secretary of State while Bill spoke at this year's Democratic National Convention.

But the past is coming back to haunt the Clintons. Lewinsky is shopping around her $12 million tell-all memoir, which will share intimate never-before-heard details about their illicit affair as well as love letters she wrote to the former president. 

"Monica wrote the letters on her computer," a source told the National Enquirer, according to RadarOnline. "In them, she opened her heart about her love for Bill and how much happier she could make him than Hillary. Some of what she wrote was so raw that she never sent them." 

According to the National Enquirer, the 39-year-old former White House intern, is seeking revenge on the man she once loved. The explosive affair essentially ruined her life -- she can't keep a relationship and has had trouble finding employment -- while Bill came out nearly unscathed. 

"Monica has tried to move forward, but the nightmare of her affair with Bill still haunts her," a close pal told the National Enquirer. "She's facing 40 without a man in her life, and seething about the way her reputation was destroyed as the whole world watched."

Friends allegedly fear that the book could end the Clinton marriage, ruin Hillary's political career and could even be damaging for Bill's heart condition.

"With Bill's history of heart problems, her book could be more than just revenge, it could kill him!"

Lewinsky was unable to expose any intimate details of their affair since she had made an immunity deal for giving a grand jury testimony against Bill. 

"But that agreement expired in 2001, and when Bill published his autobiography 'My Life' three years later, Monica felt betrayed by him all over again," the source said.

In her memoir, Lewinsky will hold nothing back. 

"For years, Monica tried to protect Bill out of a misplaced sense of loyalty," the source said. "But she no longer feels that way, and her memoir is his worst nightmare."