If you want to self-publish a book, vanity presses will be happy to take your money.
So, if I want to make a coffee-table-book sized King James Bible, printed in Gothic letters, on the fanciest grade of paper, with Gustave Dore’s illustrations, and an extravagant leather binding, that is expensive, but doable.
What about stuff that is still under copyright?
Suppose I want a set of Edgar Rice Burroughs’ Mars novels, in trade paperback format, in large-print Palatino font, on russet-tinted paper, with Frank Frazetta’s illustrations on the inside, and Gino D’Achille’s paintings on the covers. (And everyone involved getting their proper royalty payments.)
How difficult would that be to arrange?