I don’t usually read comments or reviews on sites like Amazon. We put up the work and hope people enjoy reading it as much as we enjoyed writing it. If you enjoy someone’s work, leave a review. Leave an honest review of the work. Not a review about how Amazon screwed-up your order, or how your package was damaged, or how the Fed-Ex guy tossed it carelessly onto your front porch.
The major tool a writer has to get his/her work out there in the hands of readers is word of mouth, and honest reviews. They make a huge difference at the end of the day.
So the next time you finish the last page written by one of your favorite authors, think about what you just read. Think about the journey you just ended. Think about the work that went into telling the story, reaching out across time and space to unfold it right before your eyes. If you liked it, say so.