Ever wonder what goes on when the Big Guys of the finance world make decisions about you and your customers?

You may find out very soon when former Goldman Sachs exec Greg Smith publishes his tell-all book.

Smith made headlines recently when he ripped the culture at Goldman Sachs in a New York Times op-ed.

After fielding calls from several publishers, Smith accepted a $1.5 million advance from Grand Central Publishing for a book.

How much dirt will Smith dish out? That could depend on confidentiality agreements Smith signed with his former investor and how much legal risk his his publisher will take, assuming Goldman Sachs threatens a libel suit.

Smith painted with broad brush strokes in his op-ed, essentially saying the company doesn’t give a rat’s a– about its clients. But he gave very little detail why he thinks that. Maybe Smith is saving it for his book.

No doubt Goldman Sachs isn’t thrilled that Smith’s book is coming out. The company lost a whopping $220 million the day Smith’s op-ed ran in the Times.

Is Greg Smith a whisteblower or a rat? Let us know about it below.

Tags: goldman sachs, grand central publishing, greg smith, lloyd blankfein