Or you could easily become lost in this store! The rooms are color coated and by topic and they have just about everything.
Whenever I know someone who is visiting Portland or have a friend in town, I always put Powell's on their list of things to visit along with OMSI and the Zoo. If you want a taste of Portland you'll find it at Powell's.
It would be akin to climbing Mt Everest to find a subject that Powell's (or it's branches) does not have at least a dozen books on.
Easily my favorite Portland store.