I have an iphoto book saved as a PDF file, how do I order the book from the PDF file?

AGGHHHH! I have just finished hours of work, making an album on iphoto. I finally finished placing about the 300th photo, all cropped, edited, etc etc. I wanted to check that all the photos were in, so I hit the "clear placed photos" button, thinking it would just leave me with any I'd missed, & instead it wiped my whole album!! Is there any way I can restore it? If not I did save it as a pdf file. How to I purchase the book using the pdf file?