If you have been using WordPress to blog for any extended period of time, you probably definitely have heard that you need a “lead magnet” in order to get people to subscribe.
The most popular freebie to give away is thus an e-book, it’s practically free for you to create and requires less time than other full-fledged giveaways (such as software).
However, a lot of people do not cover (no pun intended) the oftentimes underrated effect that a brilliant e-book cover can have on your conversions, and the aspect that these covers play in other parts of your site (not just for the email opt-in).

of Sparring Mind, the behavioral psychology blog with over 100,000+ awesome readers and a highly popular newsletter.