Ari Emanuel is working on a memoir, Page Six hears.

We’re told the famed agency head and fight mogul is shopping the book around, and editors are said to be drooling at the prospect.

“Think of it as Ari’s ‘Shoe Dog’ or ‘Spare,’ ” said an insider, referring to the blockbuster 2016 memoir by Nike co-founder Phil Knight and the even-more-blockbuster 2023 memoir by Prince Harry.

It’ll no doubt be lapped up by business types hoping to learn from Emanuel’s stratospheric success as the founder of the Endeavor talent agency, which merged with the William Morris Agency in 2009 to create a Hollywood megalith, as well as his time as the head of TKO Group Holdings, which owns both the UFC mixed martial arts championship and the WWE wrestling brand — two of the biggest sports franchises on earth.

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