thanks. i think i just figured out how to sync over wifi and the book's downloading.
for some reason, i'd not been able to figure out how to do that before, had only synced with my home computer.
since Kobo sent me a email saying "take a second look at this book" and it listed it as free, i sent them back an email asking why the prices are several dollars higher through my reader than they are through the computer and web browser. I'd sent them that same question last month. Maybe they'll investigate this time? They never replied last time.