Longfellow Books (in Monument Square) may as well be a feminist bookstore. I went there today to leave some used books and then was perusing their used section... it's like all feminist books! It's awesome! And there are just a ton of lady-centric and LGBT-related books all over the store, it's so cool! Barnes and Noble stores usually have some measly shelf and a half for women's studies and LGBT books, so feminists of Portland (Maine), go forth and buy local!