"There hasn't been a rush on books about Jackson, the way there has been with his memorabilia," said Rachel Deahl, news editor at Publishers Weekly. "You have to wonder what people want. ... It seems like a lot of people are celebrating his life through his music."
It will take a couple of weeks to see what kind of market a tell-all about Jackson would look like, she said.
"The tricky thing is getting stuff out in a timely manner," she said. "If someone signs a book up now, but it doesn't come out until 2010, it is going to be harder to capitalize off of the interest in his death."
It would be more difficult for a family member to publish a book quickly than an outside writer or music journalist, Deahl said.
Much of the immediate interest in Jackson's life -- and death -- revolves around the unusual circumstances in which he died. Questions surrounding the details of Jackson's death or a custody battle over his kids could either be answered in the next few weeks or take months to resolve. A long battle might lead to some new discoveries.
"The things that really draw money are books that sort of promise to reveal something that hasn't been revealed anywhere else," Deahl said. "With any biography or unauthorized biography, it's all about having new information."
But the details of Jackson's life, from his record-breaking music sales to the sexual abuse charges against him, are already very public.
"He's unlike a lot of other celebrities," Deahl said. "He's been covered exhaustively by the tabloids. As bizarre as he was, so much of that has already been exposed."
Deahl said she did not know how much a book deal with a family member could be worth, but added that a tell-all about the pop star could go either way.
In the end, the biggest winner might be Ian Halperin, who has spent five years on a book now called "The Final Years of Michael Jackson." The book is being rushed into production and has already grabbed a lot of media interest.
In January, Halperin told celebrity magazine In Touch that Jackson was deathly ill and had less than six months to live.
Noah Levy, senior editor at In Touch, edited the story and called Halperin "an amazing investigative reporter" who has "really immersed himself in Michael Jackson's world.
"It takes a lot of dedication, celebrities are very private and they have many reasons to be so," Levy said, adding that books can only tell a great story if an author commits time to do the research.
"We're not talking about a month here," Levy said. "We're talking about a couple of years. So you really have to give up your life to immerse your life in someone else's."
Given Jackson's history of secrecy, any author who can really get new information out would likely have a hit, he said.
"I don't think I've ever really heard of anyone who is so private and have more controversy than I think anyone else and to keep a lid on it," Levy said.
"Everybody's been talking about Michael Jackson for over 20 years. I think what people are going to be fascinated by -- especially by this book -- is the things that people haven't been talking about," he said. "There's so many things that people just don't know and all the secrets are going to be uncovered."
With reports from ABC News' Nathalie Tadena.