https://www.businessinsider.com/bidens-earned-156-million-from-book-deals-speeches-since-2017-2019-7?IR=T
The disclosures show that since 2017, both Bidens signed lucrative book deals, with Joe Biden earning anywhere from $8,000 to $90,000 for book-tour stops to promote his 2017 memoir, "Promise Me, Dad," and continued to earn royalties from his New York Times bestselling 2008 book, "Promises to Keep."
"Promise Me, Dad" published by Macmillan Publishers
Macmillan Publishers is owned by Holtzbrinck Publishing Group