Walter Isaacson is reportedly in early talks to write Elon Musk's biography. His famous biography of Steve Jobs sold millions of copies.

• Walter Isaacson is in early talks to write a biography of Elon Musk, Fox Business reported.
• Sources said Isaacson and Musk had discussed the book but hadn't decided if it would go ahead.
• Isaacson wrote Steve Jobs' biography, which topped 3 million US sales in less than four years.

Walter Isaacson, the author of "$4," is considering writing a biography on Tesla CEO Elon Musk, according to a report.

$4' Charlie Gasparino first reported that Isaacson had spoken to $4, but hadn't made a final decision about the project. The publication cited two people with direct knowledge of the matter.

Musk was interested in an author of Isaacson's standing writing his biography but hadn't decided whether he'd fully cooperate, the report said, citing the sources.

The people said that Isaacson spoke to Musk on the phone in recent weeks, and planned further calls with Musk in the summer. Isaacson would decide on the project after, they said.

Biographies don't require the subject's approval, but Isaacson wrote Jobs' biography at the former Apple CEO's request. Jobs died in 2011.

Sources close to Isaacson told the publication he hadn't written a formal proposal for the book yet.

"[He] hasn't decided what to do and might change" his mind, one person close to Isaacson told the outlet.

Read more: $4

In a $4 to author Ben Mezrich in January, Musk said that his work on expanding sustainable energy and space exploration "doesn't leave time to write books." Less than a month later, however, $4 that he was writing a book about Tesla, SpaceX, and the lessons he'd learned in his career.

Isaacson published "Steve Jobs: The Exclusive Biography" in 2011 after two years of writing and more than 40 interviews with Jobs. Three and a half years after its release, the book had sold 3 million copies in the US alone, $4.

Isaacson has also written books about Leonardo da Vinci, Albert Einstein, Benjamin Franklin, and Henry Kissinger.

Sources told Fox Business that Isaacson was exploring writing a book about Musk because of the Tesla CEO's rollercoaster career.

Throughout 2021, Musk has flip-flopped with Amazon CEO Jeff Bezos as the $4. Musk is the CEO of electric-car maker Tesla and aerospace giant SpaceX, founder of neurotech company Neuralink, and cofounder of transport-tunnel maker the Boring Company. He also $4 in 1999, which later became PayPal.

Musk has repeatedly said he plans to sell most of his possessions, $4, to $4. He $4 to the planet by 2050, he has said.

Musk, who was $4, also has a turbulent life away from business. $4, including a one-year-old baby named "X Æ A-Xii Musk" with musician Grimes.