Oieeee!!! I found this fantastic application that will help you make all your tweets into a book. How interesting can you get?
You just have to long into tweetbook.in and from there its easy to make it.
If you have done a lot of tweeting you may have to wait.
What can you do with your book? I suggest you take a nice print out make a nice cover for it wrap it up with nice gift wrapping and gift it to your friends/enemies.... now high light the tweets that you want them to read ?