EXCLUSIVE: Read it here first...

Is Madonna Mad About New Tell-All?

Thu., Jun. 12, 2008 5:00 AM PDT by Marc Malkin

Madonna, Christopher Ciccone, Diane Sawyer

Jim Spellman/WireImage.com, Jean Baptiste Lacroix/WireImage.com, Nancy Kaszerman/ZUMA Press

Is Madonna a wee bit nervous about her brother Christopher Ciccone's about-to-be-released memoir?

Considering the two have been on the outs for some time now, Ciccone's book, Life With My Sister, isn't expected to be a puff piece.

Madge may be so upset by the tell-all that she's been meeting with lawyers in London to talk about her possible legal options to stop publication.

"When she was meeting with lawyers and everyone was saying it was because she wanted to divorce Guy, she was really meeting with them to get the book killed," a source tells me.

Madonna's rep, Liz Rosenberg, isn't commenting on Ciccone's tome, but insists the Queen of Pop has not conferred with any attorneys. A rep for Ciccone's publisher, Simon & Schuster, declined to comment.

Also, Diane Sawyer may have either secured or is very close to securing Ciccone's first on-camera sit down. "Simon & Schuster has been talking to Diane's team for two weeks," the source says.

What about serialization of the book? Vanity Fair seems like the likely candidate. Considering how the magazine just skewered Bill Clinton, don't be surprised to hear that Editor-in-Chief Graydon Carter is willing to now take on the wrath of Madonna.

The Simon & Schuster rep said, "We have not confirmed the first interview or serialization yet." And a rep for VF said they have no plans to serialize.

Life With My Sister is set to hit shelves July 15 with a whopping first printing of 350,000.