From an article in the Wall Street Journal:
Simon & Schuster is delaying by four months the electronic-book editions of about 35 leading titles coming out early next year, taking a dramatic stand against the cut-rate $9.99 pricing of e-book best sellers.
A second publisher, Lagardere SCA's Hachette Book Group, said it has similar plans in the works.
"The right place for the e-book is after the hardcover but before the paperback," said Carolyn Reidy, CEO of Simon & Schuster
The article is here
I don't know much about book marketing, but this seems wrong to me. I would like to see every version of a book available at the same time - give the customers the choice.