Here's another question for you folks. I've got an idea for getting more reviews--but it's a bit risky. 
Here's the idea: I should direct message the people who gave Silver Princess (Book 1) a score of 3 or above and offer them a free copy of Silver Majesty (Book 2) in exchange for an honest review.
Or is that a breach of author-reviewer etiquette? I'm not trying to spam anyone...