actually, all my books aren't on my reader.
but i live in more than one country, and often travel. i'll be away for a month soon. in several countries. so i like having a wide assortment of books on the reader. pleasure reading. books i'll be teaching next term. books i've wanted to read for a while. some classics. some silly children's books and young adult books.
*shrugs* i knew it was getting full, but then when i added another 200 this weekend, it was suddenly ... oh, over 1GB used now ... less than 200 MB left ...