For whatever it's worth, which isn't much but that's never stopped me before, I started two ads last week a couple days after publishing my latest book. Also, for whatever it's worth, when I published my latest, I went ahead and put it in Select as well as all of my other books. They've all been out of Select since around January, so I figured it's only 90 days and I can see if my previous books get any benefit from the new release. The new book is priced at $4.99 which, given its length (250k words), I figured that was a reasonable price.
Anyway, both ads are for the same new release. One is with Amazon's auto targeting and the other uses keywords I picked. So far, I don't think there are any impressions on the auto ad. Mine has around 90 but no clicks. So, kind of a bust either way. I wish I was better at picking keywords. I used my knowledge from past PPC ads as well as information I read in the thread but clearly I've lost whatever magic touch I thought I used to have.
I have a low budget, under $6/day, and I don't have high bids either. Been burnt on high bids before, so I'd rather bid low and let my ads display on page five or wherever. Maybe that's a bad strategy but the opposite hasn't worked so I figured I'd give it a go.
I'll let the ads run a few more days to give them a chance but I'm not optimistic so far, which is a bit disappointing as I figured this book might do better than previous ones so I wanted to do ads to give it a fair shot.