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You've heard about Prince's estate selling rights for music and merchandising. But have you heard about the Prince books in the works?

No, not those by every enterprising photographer and writer who spent some time with the Purple One — or the People magazine-excerpted tome by Mayte Garcia, his first wife.

We're talking about three official Prince books that will be part of "The Celebration," set for April 20-23 at Paisley Park in Chanhassen. There will be three hardcover books — the Celebration, one about Prince fashion and another one about his musical instruments.

They will each cost about $35, according to Joel Weinshanker, owner of Graceland Holdings LLC, which runs Paisley Park as a museum.

What's happening with his Prince's own memoir, announced in a Random House deal in early 2016? "No comment," Weinshanker said.