The New York Public Library has pulled the plug on its planned stack attack.

The NYPL announced Wednesday it was abandoning plans to turn its iconic branch on 42nd St. from a research facility into a circulating library, a scheme that would have required the demolition of the historic book stacks under the landmark building’s Rose Reading Room.

“Throughout this process our focus has been making this library even better for our millions of visitors by creating an improved space for our largest circulating branch,” library president Tony Marx said.