A coming biography of Michael Jackson, due soon and excerpted in the New York Post over the weekend, is riddled with errors.

Ian Halperin’s book will make salacious reading but is full of fiction, sources tell me. I could have told you that myself.

For one thing, Halperin’s new assertion that Jackson didn’t know what his contract with AEG Live read is nonsense.

This notion came from Jackson flippantly telling a fan a few weeks ago that he didn’t know how he’d do 50 shows, that he thought it was just 10.

As one of my best sources on the AEG matter reiterates: “The contract always called for 31 shows and MJ had agreed to add 19 more when it was obvious how great the demand was.’ He did not die from doing 50 shows over 9 months since he hadn’t done one yet at the time of his death.’ He never collapsed in rehearsal and worked long days both filming the mini-movies and rehearsing at home with Travis Payne.’ He wasn’t supposed to come to stage rehearsals until the entire company was ready.’ This is the way he has always worked.”

So there.

As well: Halperin repeats nanny Grace Rwaramba’s assertion that somehow Michael was made to rent a house for $100,000 that was only worth $25,000 ‘ and that’the Nation’of Islam was somehow involved.

In fact, the house was found by Jackson’s shortlived manager Tohme Tohme, who’has nothing to do with the Nation of Islam. The house is’said to be owned by a Tunisian’Jew.

The irony here is that’it was Rwaramba ‘herself who brought the Nation of Islam into Jackson’s life in 2003.

There’s more, including Halperin’s insane claim that Michael had at least two gay lovers in the last years, that he dressed as a woman and slipped out of the house to meet one of them. Unfortunately, Halperin’s timelines are all wrong. Plus, everyone knows that Michael Jackson was a germ freak. The behavior described by Halperin defies all Jacko-like logic.

Beware these sudden “tell alls” and “expert biographies” of Michael Jackson. You can write anything about the dead. This party is only getting started.

Was Michael Jackson’s death an accidental murder? Was it more than just an accidental overdose on drugs?

The LAPD seems to think so: starting right after Michael’s memorial service on Tuesday, sources say that homicide detectives began making calls to Jackson’s inner circle, asking tough questions.

The questions are centered on the doctors around the world who regularly prescribed sedatives and painkillers to Jackson without even seeing him. Among the names are Dr. Arnold Klein, whom Jackson was seeing three times a week before his death.

But there are others. Right now, websites like tmz.com are thrilling to reports from a 2004 police raid on Jackson’s Neverland Ranch that turned up all kinds of prescriptions made out to aliases and Neverland employees.

But Jackson died two weeks ago, so the real investigation will be centered on current doctors and what they were giving Jackson. Klein’s name is the one that keeps coming up as the most contemporaneous. There are no doubt others, from Las Vegas, Los Angeles, and elsewhere.

Investigators might want to look into how Jackson got the drugs he needed when he was in Bahrain from 2005-2006, Ireland in 2006, and Virginia in 2007. Jackson also lived near Alpine, New Jersey in 2007 before returning to Las Vegas.

LAPD Chief Bill Bratton told CNN yesterday that based on the questioning by detectives of those closest to Jackson “we will have an idea of what it is we are dealing (with) — are we dealing with a homicide or are we dealing with an accidental overdose?”

But it’s clear that the LAPD already is thinking murder accidental or otherwise. That’s why the questions are coming from homicide.

Two things are clear though: Jackson admitted to his drug problems in a 2007 deposition. And he was running up bills of $48,000 a month at his local pharmacy. Revisit my reporting on these two important facts:

Michael Jackson Admitted Drug Use in 2007 Testimony

Jacko: $48,000 A Month in Prescriptions

Michael Jackson’s longtime nanny and employee, Grace Rwaramba, did indeed sell out to vulture-like celebrity interviewer Daphne Barak.

Barak has posted a clip from the interview on her website and on YouTube as a teaser.’ The intention is to sell it somewhere. Barak routinely gets her “scoops” by paying her interview subjects, according to sources.

Today Barak started e-mailing the clip around to various Jackson insiders hoping to get them to jump on her bandwagon.

Rwaramba has denied doing the interview. But the clip speaks for itself. She tells Barak how she was fired last spring on a Sunday morning by telephone. The nanny says “the guy”’presumably Tohme Tohme’”terminated” her by offering her a “ridiculous” salary.

“Were you surprised?” Barak asked her. “Not really,” Grace replied. “It had happened before.”

The minute-long clip is interesting because Rwaramba will be offered as an important person in the lives of Jackson’s children when their grandmother, Katherine, goes to court next Monday to establish custody rights. The Jacksons seem unaware that Rwaramba’who was well compensated by Jackson’would turn on him, and for money.

Also, the nanny seems to indicate to Barak that she was “laid off” because she refused to take a low salary. That would certainly bring into question her selfless devotion to the children.

Ironically, Barak now is the common thread between Rwaramba and Michael’s parents, Katherine and Joe Jackson. Back in 2005, Barak interviewed the Jacksons, then sold the interview to CBS. Sources told me then that Barak kicked back a fee to the Jacksons. In 2005 I reported that both Joe Jackson and Daphne Barak were secretly in business with a man named Charles Coupet, who also served as a literary agent for Macaulay Culkin’s father, Kit. ‘A year earlier, in 2004, Barak called this reporter and said, “I have Joseph Jackson on the phone and we want to talk to you about a project.” I passed.