She was really really stupid to piss him off:

He claims he heard the governor several times say how nice it would be to take advantage of the lucrative deals that were being offered, including a reality show and a book. “I think the big deal was the book. That was millions of dollars,” said Johnston, who has had a strained relationship with the family but now says things have improved.

She quit to join the Limbaugh-Coulter industry. But you've got to love the response:

“It is interesting to learn Levi is working on a piece of fiction while honing his acting skills,” Palin family spokeswoman Meghan Stapleton said in an e-mail to The Associated Press.

If I were Levi, I'd get myself a book deal. He's the only one who seems sane. And maybe he could scoop Sarah. You know that for that money, she's gotta have some beans to spill. And a calendar? That would sell.