I'm curious as to how useful of a skill this is. I did my entrance theory exam today for the University of Toronto jazz program, and out of all of it, this was the only section that gave me any trouble. It definitely seemed like more of a piano player thing. I consequently have a couple questions -- As a bass player, how useful is this going to be in the future? Now, I also want to get into arranging and composition. I can see it being very useful for this, though. Now, since I imagine it might be pretty useful to know it for this purpose, other than ripping off Bill Evans lines from the VV recordings (which is far beyond the scope of my ear at the moment) how can I get into this? "This" specifically being rootless/open voicings. I've heard general good things about the Jazz Piano Book by Mark Levine. I have his Jazz Theory Book (the study of which proved invaluable to the theory exam today!) so I'm passingly familiar with some of the things that might be in it.