Young told "Good Morning America" today that Edwards' activity in recent weeks was suspicious, given the timing of the book release.
"I will say I'm genuinely surprised that after 2, 2½ years of this ongoing, within 10 days of my book coming out, all of a sudden John's building houses in Haiti," Young said. "He's confirmed he's the father of the baby."
Young said he has saved voice mail messages and e-mails from Edwards and his camp proving that he had been asked to help the one-time presidential nominee hide his pregnant mistress while he made a bid for the White House, his cancer-stricken wife by his side.
He got the call asking to cover up Edwards' paternity of Hunter's baby while shopping for a turtle aquarium for his children, he told "GMA." He said he agreed, not only out of loyalty for Edwards and compassion for Edwards' terminally ill wife, but because he had been assured by "two very powerful people" that every viable Democratic presidential hopeful had something to hide.
"We were convinced by the people that were talking to us about this that all of the candidates had skeletons in the closet," he said, adding that he doesn't believe that accusation now. "I'm not making a charge that it's true."
Young told "20/20" that it cost Edwards benefactors' $1 million in cash, private jets and hotel rooms to cover up the affair and Hunter's pregnancy.
Hunter has also filed suit against Andrew and Cheri Young seeking damages for invasion of privacy.
Click here to read an excerpt of Andrew Young's book, "The Politician."