Former President Bill Clinton is cheating on Democratic Party presidential candidate Hillary Clinton and "has a blonde, busty mistress" code named "Energizer" by Secret Service agents, according to author Ronald Kessler, a former investigative journalist at the Washington Post.

Kessler published his claims in his book, "The First Family Detail: Secret Service Agents Reveal the Hidden Lives of the Presidents."

"He has a blond, busty mistress, and she's been code named Energizer by agents," the author told Chris Stigall on Talk Radio 1210 WPHT. "This is unofficially, but that is what they call her. … She comes in to the Chappaqua [NY] home whenever Hillary leaves. The details coordinate to make sure they don't cross paths. She, unlike Hillary, is very nice to the agents. She'll bring cookies."

Kessler also says Bill and Hillary's relationship is only based on their longing to win the White House again in 2016.

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"Agents say that it's a business relationship. It's not a marriage at all. It's a total fake, like everything else about Hillary. It's just a big show and a scam."

In "Their Lives," a ground-breaking examination of the accounts of seven women, libertarian commentator Candice E. Jackson examines how Bill Clinton and his inner circle wielded their vast power to discredit and destroy the former objects of his desire.

The book's Amazon description says "Energizer" "shows up to be with Bill every day while the likely future presidential candidate is away."

Kessler also alleged that Hillary treats the agents that protect her with "contempt."

"In fact, she's so abusive to agents, that being assigned to her detail is considered a form of punishment," he told Stigall.

Listen to the interview with Stigall in which the author spills these secrets on Bill and Hillary Clinton:

According to Kessler, Vice President Joe Biden "swims nude at the vice president's residence in Washington and at his home in Delaware."

And seeing the 72-year-old in all his glory offends female Secret Service agents, he says.

The book also alleges Biden "spends millions of taxpayer dollars flying to and from his home in Delaware on Air Force Two. His office tried to cover up the costs of the personal trips."

What do YOU think? Sound off on claims Bill Clinton is cheating on Hillary again

Other revelations in the book:

Secret Service agents have been dismayed to overhear Michelle Obama push her husband to be more aggressive in attacking Republicans and to side with blacks in racial controversies.

Secret Service agents were ordered to ignore security rules and allow the SUV carrying actor Bradley Cooper to drive unscreened into a secure restricted area when President Obama was about to deliver his speech at the White House Correspondents Dinner.

Because the Secret Service refused to provide enough magnetometers at his campaign events, Mitt Romney regularly left himself open to assassination by giving speeches to unscreened crowds.