Editor’s Note: This story first appeared online in the Sunday edition of the New York Times. We reprint in part here.

The book does not hit shelves until May 5, but already the Republican Rand Paul has called its findings “big news” that will “shock people” and make voters “question” the candidacy of Hillary Rodham Clinton.

“Clinton Cash: The Untold Story of How and Why Foreign Governments and Businesses Helped Make Bill and Hillary Rich,” by Peter Schweizer — a 186-page investigation of donations made to the Clinton Foundation by foreign entities — is proving the most anticipated and feared book of a presidential cycle still in its infancy.

The book, a copy of which was obtained by The New York Times, asserts that foreign entities who made payments to the Clinton Foundation and to Mr. Clinton through high speaking fees received favors from Mrs. Clinton’s State Department in return.

“We will see a pattern of financial transactions involving the Clintons that occurred contemporaneous with favorable U.S. policy decisions benefiting those providing the funds,” Mr. Schweizer writes.

His examples include a free-trade agreement in Colombia that benefited a major foundation donor’s natural resource investments in the South American nation, development projects in the aftermath of the Haitian earthquake in 2010, and more than $1 million in payments to Mr. Clinton by a Canadian bank and major shareholder in the Keystone XL oil pipeline around the time the project was being debated in the State Department.

In the long lead up to Mrs. Clinton’s campaign announcement, aides proved adept in swatting down critical books as conservative propaganda, including Edward Klein’s “Blood Feud,” about tensions between the Clintons and the Obamas, and Daniel Halper’s “Clinton Inc.: The Audacious Rebuilding of a Political Machine.”

But “Clinton Cash” is potentially more unsettling, both because of its focused reporting and because major news organizations are expected to pursue the story lines found in the book.

Members of the Senate Foreign Relations Committee have been briefed about the book’s findings, which have already made their way into several of the Republican presidential candidates’ campaigns.

Read the full story here.