Amazon Book Marketing: Calculating a CPC That Won’t Burn Your Cash

If you’re not careful, managing your own book-advertising campaign is basically setting money on fire.

Whether you’re a self-published or “traditional” author, you know that advertising is potentially a huge factor in book sales.

Sure, some books have become bestsellers purely though word-of-mouth and a little luck; the first example that comes to mind is “The Martian,” which became a monster hit after its author, Andy Weir, started publishing chapters…