*Cocks head and smiles* Poor Erin. I'll help you, if you like. Here's a guide line: if there is a book that you can't remember as being a good book (for instance, you would look at it in the store and say, 'Yeah, I read that. It was a good book. You should read it.") and/or it doesn't have sentimental value (ex: my grandfather gave this book on historic dresses to me on my sixth birthday with the hopes that I would grow up to be a dress maker and now that's what I do for a living) then you're pretty safe in tossing it. If there are no books like that...I'd be pretty surprised. Or maybe your definition of 'good book' is too broad.
mh