convert a PDF A4 to PDF A5

Hello,

I am trying to convert a PDF A4 to PDF A5 in order to send it to the Lulu.com for publication. How can I do that....Pleaaaaase

Thanks

Google usually does the job...here you go: Converting an A4 pdf file to an A5, hope this will help

Thanks,

I though that the CUTE PDF Writer is working only for Windows. I could not find it to download it.
Actually i found other way to do it. I opened the pdf and: click "file" (from the bar menu), "print" and click in the PAPER SIZE A5. After that on your left of the opened window there is a PDF icon and click. Save your pdf with the option "Save as PDF..." and finished.

Thanks anyway!!!