According to a new book, FBI agents claimed the discovery of thousands of Hillary Clinton’s emails on Anthony Weiner’s laptop was an “oh s***” moment, with one admitting there were “ten times” as many as former FBI Director James Comey has admitted to publicly.

The book, titled ‘Deep State: Trump, the FBI, and the Rule of Law,’ written by James B. Stewart, paints a picture of an agency stunned by the findings.

Thousands of additional emails were discovered after investigators found them on devices used by Weiner and his wife Huma Abedin. The agents had been probing the former Democrat congressman’s explicit texts with a 15-year-old girl.

“The agents called the discovery an ‘oh s***’ moment as they combed through Weiner’s iPhone, iPad and laptop,” Stewart writes.

RELATED: Report: FBI Never Reviewed Vast Majority of Emails Found on Anthony Weiner’s Computer

‘Oh s–t’: The moment FBI agents found Hillary Clinton emails on Anthony Weiner’s laptop https://t.co/IgObMtcMRw pic.twitter.com/4qXL9sw5w0 — New York Post (@nypost) October 9, 2019

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The shock matched that of Abedin, a top aide to Clinton, who apparently broke down in tears when she realized her husband’s latest sexting scandal had exposed Hillary’s emails to further scrutiny at a crucial point during the 2016 election.

Clinton herself wrote in her election biography ‘What Happened,’ that Abedin appeared “stricken” after hearing that they had found the emails.

“This man is going to be the death of me!” before “bursting into tears,” Clinton said of Abedin.

RELATED: Clinton: Huma Abedin Broke Down Crying After Husband’s Sexting Scandal Led to Email Investigation

Huma Abedin broke down sobbing in front of Hillary Clintonhttps://t.co/IYfp9aiGK6 — Bradley Wood (@Dlakeside) September 6, 2017

Of greater concern, Stewart writes that an FBI agent – described as “determined” – was dismayed that the agency under Comey’s direction wasn’t pushing to complete the investigation.

“I’m telling you that we have potentially ten times the volume that Director Comey said we had on the record,” the agent told Stewart. “Why isn’t anybody here?”

FBI technicians discovered 340,000 emails on the laptop between Clinton and Abedin many of them from domain addresses such as ‘hillaryclinton.com’ and ‘state.gov.’

Of those, investigative journalist Paul Sperry said only 3,000 were individually reviewed by the agency.

RELATED: Trump Taunts Hillary: Go Ahead, Jump in the 2020 Race

.@RealClearNews reporter @paulsperry_: “Comey told Congress that they had reviewed all of the Clinton emails, hundreds of thousands, that were found on the Weiner laptop. That was not true. They barely looked at any of them. Just 3,000 of 700,000 were individually examined.” pic.twitter.com/vkoX7UKRdG — Daily Caller (@DailyCaller) August 24, 2018

Stewart writes that the discovery of a treasure trove of emails fell through the cracks because top FBI officials were “overwhelmed” by the Russia probe.

Overwhelmed, or was the Russia hoax more relevant to the political leanings Comey was operating under at the time?

President Trump recently challenged Clinton to get into the 2020 race, suggesting one condition in which she “must explain all of her high crimes and misdemeanors including how [and] why she deleted 33,000 emails.”