Actor Sean Penn's debut novel's main character calls for the assassination of the president and dares the commander in chief to 'Tweet me, b****', DailyMail.com can reveal.

The two-time Oscar winner's 176-page fiction, titled Bob Honey Who Just Do Stuff, is about a 'modern American man, entrepreneur, and part-time assassin'.

The main character, septic tank cleaner Bob Honey, tells tales of working with military contractors in Iraq, being employed by the government to kill the nation's resource-draining elderly, and meeting an El Chapo-esque drug lord who had just escaped prison.

Penn first released the gonzo journalism-style novel as an audiobook in 2016 under the pseudonym 'Pappy Pariah'.

Actor Sean Penn's debut novel will be released on March 27. The book, titled Bob Honey Who Just Do Stuff, is about a 'modern American man, entrepreneur, and part-time assassin'

During appearance at the Los Angeles County Museum of Art at the time, Penn said he had close bond with Pariah, but also called him a sociopath.

Penn didn't publicly acknowledge that he wrote the book until months later when he said he wanted to expand on the story and publish it in paper form.

He said in a news release: 'It was soon after I finished narrating the short audio of 'Bob Honey' that I began to feel I had only scratched the surface of this story I wanted to tell.

'Expanding that original idea into a fully-realized novel has been an exciting challenge.'

The book's main character, Bob Honey, is painted as a 55-year-old Southern Californian who gets angry at the news, despite not fully understanding it.

Baby Boomer Honey tells readers of his neighbor's death by an out-of-control helicopter, his imaginary young girlfriend and a 'yellow lives matter' march - referring to Aryan blonds - at the Republican National Convention.

Throughout the novel, Honey is followed around by an investigative reporter, who he seems skeptical of.

The reporter tells Honey he wanted to do a story after neighbors raised concerns about his odd behavior and strange work hours.

Toward the end of the novel, Honey admits himself into a hospital and writes a letter to the president of the United States, who is eerily similar to Donald Trump but goes by the name, Mr Landlord.

He writes: 'Many wonderful American people in pain and rage elected you. Many Russians did too. Your position is an asterisk accepted as literally as your alternative facts.

'Though the office will remain real, you never were nor will be. A million women so dwarfed your penis-edency on the streets of Washington and around the world on the day of your piddly inauguration - unprecedented (spelling ok?).'

The character says that those against Mr Landlord 'own the most powerful weapons on earth' which include 'dreams, the science of physics, seismology, geology, topography, and typhoons'.

Honey continues: 'Your gasconade and cache of catchphrases, so limiting and reflexive, escalate the emasculation of you by a world whose patience is in nuclear peril. These sciences and sensibilities are our guns your narcissism neglects.

Toward the end of the novel, Honey admits himself into a hospital and writes a letter to the president of the United States, who is eerily similar to Donald Trump but goes by the name, Mr Landlord

'Weapons your NRA masters are incapable of proffering for profit, and outside your dutiful military's might, mandate or mission.

'So to your attempt to posthumously assassinate our Founding Fathers, and bait and switch your core, I say I will eat where the fish are glowing.

'You are not simply a president of impeachment, you are a man in need of an intervention. We are not simply a people in need of an intervention, we are a nation in need of an assassin. I am God's squared-away man.

'I am Bob Honey. That's who I am. Sir, I challenge you to a duel. Tweet me, b****. I dare you.'

Following the letter portion of the book, Honey reflects on Mr Landlord's opposition in the election, who one news anchor calls 'the absolutely worst possible candidate to represent the party'.

The comments reflect those made after Hillary Clinton lost the 2016 presidential election.

'Not charismatic for you folks?' the narrator questions. 'Too shrill? Too Hawkish? Isn't it true that you said you never wanted qualifications? You wanted a star, you wanted to be charmed, seduced, and entertained.

'Was she the worst possible candidate or are you the most arrogant, ill, and unqualified electorate in the history of the Western world? And what does it matter now? She never came to entertain you.'

Penn himself has been outspoken in his contempt for Donald Trump, calling him an 'enemy of mankind' in an op-ed for Time Magazine in January.

'Trump is an enemy of Americans, Republicans, Democrats, Independents and every new child born. An enemy of mankind. He is indeed an enemy of the state,' he said.

The epilogue of 'Bob Honey' features a lengthy poem, in which the narrator calls the #MeToo movement an 'infantilizing term of the day'.

'Is this a toddlers' crusade?' the narrator asks. 'Reducing rape, slut-shaming and suffrage to reckless child's play? A platform for accusation impunity? Due process has lost its sheen?'

Following the letter portion of the book, Honey reflects on Mr Landlord's opposition in the election. The comments reflect those made after Hillary Clinton (pictured) lost the 2016 presidential election

Long before the modern #MeToo movement made its mark on Hollywood, Penn was accused of several violent outbursts directed at his now ex-wife, Madonna.

The notoriously toxic relationship in the 1980s was fraught with Penn's drinking, mood swings, violence and taste for pornography, Madonna said at the time.

Penn was accused of tying Madonna to a chair and beating her, and another time he was said to have hit her with a baseball bat.

Several times he promised to go to rehab or therapy, or to father a child with her, and each time Madonna took him back. The couple divorced in 1989 after four years of marriage.

Nearly 30 years later, in 2015, Madonna spoke publicly about her relationship with Penn in court documents.

She said in the legal filings that while their relationship was rocky, Penn never hit her.

'I am aware of the allegations that have surfaced over the years accusing Sean of incidents of physical assault and abuse against me,' Madonna testified in Penn's lawsuit against Empire creator Lee Daniels.

She continued: 'Specifically, I am aware of the allegations concerning an alleged incident that occurred in June, 1987, whereby (according to tabloid reports), Sean allegedly struck me with "a baseball bat." I know the allegations in those and other reports to be completely outrageous, malicious, reckless, and false.'

She added: 'I am also aware of allegations concerning an incident that occurred in December, 1989, which purportedly resulted in Sean's arrest for domestic assault and battery against me.

'I know those allegations to be false. While we certainly had more than one heated argument during our marriage, Sean has never struck me, "tied me up," or physically assaulted me, and any report to the contrary is completely outrageous, malicious, reckless, and false.'

Madonna isn't the only one Penn was reportedly violent against - he spent 33 days in jail for assaulting a film extra in 1987.

An entire chapter of Penn's new book dedicated to an El Chapo-esque character. Joaquin 'El Chapo' Guzman's capture in 2016 came after a now famous interview with Penn

He was also once arrested for attempted murder after was caught dangling a paparazzo from his ninth-floor hotel room balcony while filming Shanghai Surprise in Macau.

He then fled his jail cell and escaped to Hong Kong, police said, and Potuguese police later gave him a pardon.

On another occasion, he was charged with battery and vandalism after kicking a paparazzo and breaking his camera in 2010.

Penn's controversial past doesn't end there: He came under fire for a joke that many deemed 'racist' following the 2015 Oscars ceremony.

Penn, who was presenting the best picture award, caused uproar when he opened the envelope and asked, 'Who gave this son of a b**** his green card?' before announcing the winner was Birdman.

Directed by the Mexican-born Alejandro Iñárritu, many questioned the intention behind the joke and whether or not it was distasteful.

A 'green card' is a document that marks permanent residency for immigrants in the United States.

Iñárritu, who said he found the joke 'hilarious', directed Penn in the 2003 film 21 Grams and the two remain close to this date.

And just last year, Penn tried to quash a documentary after fearing he would be killed by people connected to drug lord Joaquin 'El Chapo' Guzman.

El Chapo was captured in 2016 after Penn and Mexican actress Kate Del Castillo visited him in the Sinaloa mountains at one of his safe houses while he was still on the run.

The pair had interviewed him for Rolling Stone - a story published just days after El Chapo was captured.

Their meeting was the subject of a recent Netflix documentary in which Del Castillo, 40, told how she fell in love with Penn while they worked together to meet Chapo and was devastated when he betrayed her to write an article about it for Rolling Stone.

An entire chapter of Penn's new book is dedicated to an El Chapo-esque character, who escapes jail through an underground tunnel and joins Honey on a boat ride.

Penn's Bob Honey Who Just Do Stuff, published by Atria Books, will be released on March 27.