Parse a XML string in groovy using XmlSlurper

XMLParse.groovy

books = '''
    <response version-api="2.0">
        <value>
            <books>
                <book available="20" id="1">
                    <title>Don Xijote</title>
                    <author id="1">Manuel De Cervantes</author>
                </book>
                <book available="14" id="2">
                    <title>Catcher in the Rye</title>
                   <author id="2">JD Salinger</author>
               </book>
               <book available="13" id="3">
                   <title>Alice in Wonderland</title>
                   <author id="3">Lewis Carroll</author>
               </book>
               <book available="5" id="4">
                   <title>Don Xijote</title>
                   <author id="4">Manuel De Cervantes</author>
               </book>
           </books>
       </value>
    </response>
'''
response = new XmlSlurper().parseText(books)
response.value.books.book.each{
    bookname = it.title
    println bookname
}