my book has been done with WORD using Lulu's templete with images now should I convert it to PDF before publishing?
You can save it as a PDF to ensure the formatting is correct. If all is as you want, you can then upload the PDF.
Alternately, you can upload your Word file and our converter will create the PDF file for you to review.
Word Save As PDF seems to be defaulted to the type of PDF Lulu's Wizards like, which is handy.
You can also download dopdf which is free. Then click print in Word and select dopdf as printer. Choose inbed fonts and save. Uploading that will make things easier.