Major Publishers Won't Make Book Deal With Casey Anthony

We broke the story ... an NBC news producer has contacted literary agents and told them Casey has agreed to do a TV interview with the network if he can lock up a book deal.

But according to the three publishing powerhouses -- that ain't happening ... just check out the statements we received regarding a possible Casey Anthony publishing deal:

Simon and Schuster: "We are 100% not interested. We are NOT NOT NOT interested. Simon & Schuster is not publishing, and has never intended to publish, any book by Casey Anthony, her family, or any member of her team.

Harper Collins: "We are planning on publishing the Prosecutor's book who was involved in the Casey Anthony case, so we have no plans in releasing a Casey Anthony book. We're sticking with the prosecutor."

Penguin Group: "We have no plans on doing a book deal with Casey Anthony."