Lulu and ebooks

So, I went to LULU, and with great trepedation bought Drew Millers book, Caelarus. It was easy to get them to take my money. But as usual, it is imposible to get the book out of them. I downloaded the thing from Adobe, twice actually, but still no book. I'm about as disgruntled as I have been any time in the last 10 years.

I don't know why LULU is always such a problem. I have downloaded several books from Amazon without issue.

Gwendolyn