"Here is my end of the year request: if you have read a book of mine, especially if you received it for free, would you please pop over to Amazon [and/or GoodReads] and post a review? It doesn't have to be long-- just a few sentences will do. If you've received a review copy but haven't had time to read it-- I understand! I am behind in my reading, too. But it would mean the world to me if you'd post a review whenever you do read it, even if it's months (or years!) after the book was published. Reviews matter and they help get my books seen by more readers. I appreciate all of your lovely words and encouraging support. Thank you!"
-- cut and pasted from Kristina Wright, because she said it so nicely.