I wouldn't worry about what the book calls for. Use what you like and what you can find or maybe already have. That a cool bowl. Personally I wouldn't even use oak on that . but I'm not a fan of oak at all. The grain is to obnoxious for me in most cases. I'm not sure why pine and poplar get a bad rap. Poplar especially can be beautiful. Maybe cuz soft . don't get me wrong I love the looks of cherry, maple, walnut and all the other usual suspects after a good oiling. I just love the look of wood my wife thinks I'm crazy when I show her a rough piece of cherry and talk about it's beauty. Lol. Sorry this post got long and may not be of any help. My point is don't get pigeon holed.