If you're gonna shop Powells, then take the weekend off and drive down. I could spend DAYS in that store…it's so awesome.
True, but sometimes you don't have a whole weekend to devote to book shopping. There are a bunch of used book stores near Powells too.
While in Portland you can also check out Universal Cycles, then head out to Hood River to ride Surveyor's Ridge [HTML_REMOVED] then Bingen, Wash. for Syncline.