title: Crystal Reports book for formulas or charts
body: <p><p> I have completed Crystal Reports 2011 for developers  and  i am ready to move onto the next stage<br />
  I would like to learn ways of doing complicated reports ( as that is my job now ). <br/>
  Is there a good advanced or intermediate book out there on formulas <br/>
  and one on charts , these are the two areas i wish to develop<br/>
  any help would be appreciated <br/></p>
  
  <p><br/>
  Thank you so much </p>