The book, titled "Why I Left Goldman Sachs", is set for publication on October 22, the Times said.
Smith quit as an executive director at Goldman after writing an op-ed in the Times on March 14 that accused the firm of routinely ripping off clients. He also wrote that top management had morphed Goldman into a "toxic and destructive" place that put profits ahead of all else.
Smith's book is expected to provide an inside look at how Goldman operates, based on his 12-year career at the bank.
Goldman, which conducted an internal review after Smith's op-ed ran, has said there was no substance to his assertions.
"Every day, some young professional, after a decade in a post-collegiate job, reassesses his or her career and decides to move on and do something else," Goldman spokesman David Wells said in a statement on Wednesday.
"Others can better judge whether Mr. Smith's particular career transition is of unique interest."
A spokeswoman for Hachette Book Group , whose Grand Central Publishing division is publishing Smith's memoir, did not immediately respond to a request for comment.
(Reporting by Lauren Tara LaCapra in New York; Editing by Dale Hudson)