This had to happen eventually, and today's as good a day as any. There's not a lot I can say about Miles Davis's Kind of Blue (1959 - 55 minutes) that hasn't been said better by others. So I'll confine myself to saying: just put it on, and on each track listen to Miles's solo, John Coltrane's, Cannonball Adderley's, and you'll know why if you don't already. It's 'the best-selling jazz record of all time. It is also regarded by many as the greatest jazz album of all time'. It's 'an album that towers above its peers, a record generally considered as the definitive jazz album, a universally acknowledged standard of excellence'.
As The Book says, 'If you have anything approximating to a jazz collection, you will already have this record'; so I'm probably wasting my time.
[Links to the rest of the series.]