No exaggeration: Art Tatum -- the legally-blind, African-American pianist -- is one of the great creative geniuses in history. In my opinion his art should be ranked alongside figures as diverse as Homer, Dante, Cervantes, Shakespeare, Rembrandt, Michelangelo, Van Gogh, Picasso, Bach, Mozart, and Wagner.
More specifically, in regard to jazz, Tatum is at once both its Bach AND its Beethoven, in the sense that his music not only subsumes, like Bach, all of the major musical styles that came before him; he also, like Beethoven, revolutionarily anticipates, without being surpassed by, all of the major styles that came in his wake.
Sadly, owing to the blindness and stupidity of jazz critics, whether African-American or otherwise, Tatum's gargantuan achievement (which transcends, it goes without saying, the mealy-mouthed contingencies of whichever political faction you happen to uphold) is probably never going to be given its due accord in music history, through no fault of his own. Fortunately, for those of us who love art enough to put aside our political differences, Tatum's recorded legacy stands among the grand artistic achievements of mankind.
So, all I can say is this: if you happen to care about great music, get this collection while it's still available, and enjoy the living hell out of it while you can. Because, as far as I can see, there are so many humorless pedants out there right now, that I can easily conceive of a future in which something as essential as Tatum's SOLO MASTERPIECES might very well be hard to come by.