title: how to pass a list of objects over VF page
body: <p>I am new to salesforce and apex.</p>
  
  <p>In my 1st VF page it shows some book names (from DB) and when I want to add more books I put a button in the 1st page and shows all the books from DB in the 2nd page.</p>
  
  <p>If I selected some of the books from page2, I have to add it in the first page with the previous results (books).</p>
  
  <p>How can I do this in APEX Visualforce?</p>