Some bestsellers include "Old School: Life in the Sane Lane", "The O'Reilly Factor: The Good, the Bad, and the Completely Ridiculous in American Life", "The No Spin Zone", "Killing Lincoln", "Things That Matter: Three Decades of Passions, Pastimes and Politics" and "Killing Jesus".
Some of O'Reilly's critics were happy with the news. O'Reilly could be totally innocent but when advertisers abandon ship, it's over.
21st Century Fox said earlier on Wednesday that O'Reilly would not return to Fox News after his impromptu vacation, ending weeks of speculation about his future at the outlet.
Early in his career, O'Reilly worked at WFAA-TV (Channel 8) from 1976-78. When Variety asked about the next one in development, "Killing Patton", the channel said "we're not making any decisions today".
The National Geographic channel has aired a series of adaptations of O'Reilly books, including "Killing Reagan" and "Killing Kennedy". For years, the show has been a huge revenue source for its network, Fox News, and especially its parent company, 21 Century Fox.
Fox News on Wednesday severed its ties with Bill O'Reilly, sacking its biggest star and America's most-watched cable news anchor over a flood of sexual harassment allegations and crashing advertising sales.
But the climate shifted dramatically after The New York Times reported on April 1 that O'Reilly or Fox had paid $13 million to settle five cases against him alleging sexual or other harassment.
When the Republican Party convened in Cleveland in July to nominate Donald Trump for president, Fox News was led by Chairman Roger Ailes and the prime-time lineup of Greta Van Susteren, Bill O'Reilly, Megyn Kelly and Sean Hannity.
Others figure that O'Reilly's firing won't be a sticking point for most Fox viewers.
Last week, the Murdochs enlisted the law firm Paul, Weiss, Rifkind, Wharton & Garrison to investigate O'Reilly's behavior after one woman who had related complaints against O'Reilly to The Times called the Fox hotline to report her allegations. Eric Bolling, who had been a co-host of "The Five", is taking the 5 p.m. hour by himself, though his new show will not debut until May 1. In the first quarter of this year, the network averaged 2.7 million viewers between 7 p.m. and 11 p.m. ET, double the viewership of second-place MSNBC.
The Late Show host resurrected his Colbert Report alter ego - one that heavily borrowed from O'Reilly's combative broadcasting style - on Wednesday's show, with "conservative pundit Stephen Colbert" appearing via satellite to eulogize the ousted Fox News host - or, as Colbert affectionately calls him, "Papa Bear". He was scheduled to return Monday.
It marks a stunning end to a near flawless marriage between a pugnacious personality and network. The host is presumably owed tens of millions of dollars under the terms of his multi-year contract, though the contract may have contained clauses allowing Fox News to get out of the deal. The meeting was part of the pope's weekly general audience. Dozens of advertisers pulled out of "The O'Reilly Factor".
The prime-time presenter, who has been with the USA network nearly since its inception, has denied all of the allegations.
On Wednesday, he was seated in the VIP section, where a photographer from the Vatican newspaper L'Osservatore Romano snapped a photo of Francis reaching out to shake his hand.
Bill O'Reilly is reportedly on his way out at Fox News Channel.