Where is the serial number in my ebook?

I purchased ebook Adobe Dreamweaver CC: The Professional Portfolio as an ebook from ATC.com, but nowhere in the book is the serial number which would activate free web hosting at ATC.

Has anyone else had this issue? Unfortunately, the ATC office is closed right now, and I doubt this is an issue covered by Adobe, but I figured I would give it a try since Adobe is the one that installs the digital book content and contains it on my computer with Digital Editions. Thank you. I hope i can finish my final project in time.