How do I get a book from my computer onto my ADE bookshelf?

I uploaded an eBook, saved it to my computer folder, then I copied it to my Adobe Digital Edition next to the only book I have there, "Getting Started with Adobe Digital Editions."  My purchased book is not on my ADE bookshelf.  Where do I put it?  I need to access it from my iphone & iPad, because it is a reference for my work.