It's the full bass transcription off the 1959 album Kind of Blue with Miles Davis.
The biggest update is added chord symbols to help keep your place in the song more easily. Some tweaks with measure spacing should help it read more easily as well.
I sent out updates to folks who have already purchased the prior transcription to get the update for free. If for some reason you didn't receive it, just drop me a line and I'll gladly get you the new one.