Passing list of objects from Grails controller to iReport generated Jasper report -

can please me started on generating reports grails? let's have book domain class , want pass list of books ireport generated jasper report. need in order generate report lists book titles , authors? this:

class book{    string author    string title  }   def listbooks = {    def books = book.list()    chain(controller:'jasper',action:'index',model:[data:books],params:params)  }  

what need on grails side , on ireport side? little resources jasper noobs.