Member Rara Avis
The Library thingy is for you to be able to store your favorite poets or poems in your own personal libarary. So you can pull them up at any given time. Go to the top of the page there and you'll see "Private Library" that should also explain it for you.
As for your book post, no one knows who voted for them, (unless of course that person says so in their reply) or how many votes they receive. If you check out the link there under the box you check for submitting it, you can read all about the book, the voting and all we need to know about how it works. You can go into the Members section and read in the topic "Voices on the Web" also.
As for your old post in 2, you would either have to copy and paste it into Voices on the Web, as you would a new post, or retype it in as you would a new post. Then mark it for book submission.
I hope this has helped you out.