You probably haven't heard of Sheila Weller's gossipy chronicle of women in television The News Sorority, but just wait. You just wait. The galleys for the new tell-all book - released in September - have been doing the rounds in the entertainment business and it ain't pretty.

Diane Sawyer Katie CouricDiane Sawyer [L] and Katie Couric [R] [Getty/Neilson Barnard]

In the book, Diane Sawyer comes across as a workaholic who uses her sex appeal and charm to her advantage. In one section of the book, Weller alleges that Sawyer and Katie Couric competed tirelessly for "gets" when they hosted rival morning shows Today and Good Morning America.

Weller writes - according to the Daily Beast's report - "When a friend of Diane's, a public figure, was being pursued by Katie's people, the wooed eminence got a call from [Diane's husband, the famed director] Mike Nichols, who said-in a very nice way, to be sure-that he and Diane would essentially cut off all social contact if their friend appeared on Today."

More: who is Katie Couric's new husband John Molner?

More: check out our Katie Couric pictures

When Diane beat Katie to an interview with a 57-year-old woman who'd given birth to twins, Couric allegedly mused aloud, "I wonder who she blew this time to get it."

Couric was dubbed "America's Sweetheart" during her 15 years on the 'Today' show, but she jumped ship to join CBS Evening News in 2006 and reportedly became the highest paid journalist in the world, earning $15 million a year. 

Back in June, a TV source told Mail Online, "This book is riddled with inaccuracies, dates and ratings that are mentioned are not correct. What's sad is that this could have been a fantastic book instead of something that has blatant misogynistic undertones. These women are fascinating, all of them have sides, of course, but all of them have worked extremely hard to get to where they are."

Another said: "Katie is taking this on the chin, she's spunky, she's had enough c**p written about her before, but this is really the first time that Diane has been written about in this way, she's not happy."

More: check out our Diane Sawyer pictures