How to deserialize multiple object with xStream

i try to read multiple object with xStream

This is my XML file

<book>
   <title>abc</title>
   <author>A</author>
   <pagesCount>0</pagesCount>
</book><book>
   <title>qwe</title>
   <author>B</author>
   <pagesCount>0</pagesCount>
</book><book>
   <title>zxc</title>
   <author>C</author>
   <pagesCount>0</pagesCount>
</book>

With this code I can get onlY the first book, can you tell me how to read a code, with which i am able to read all objects(books)

XStream xstream = new XStream();
xstream.processAnnotations(Book.class);
Book a = (Book)xstream.fromXML(new File("a.xml"));