Best book writing software

Scrivener is a specialized word processor for writing books. I’ve used to write my last three published books (non-fiction) and now I’m using it to write a novel. It’s especially useful for collecting and organizing research materials. I can add audio recordings, websites, images, and videos, making them easy to find. It also has excellent outlining and corkboarding tools. In addition to helping me write books, I use Scrivener to write long articles and reports. The Mac version is on sale for $30 (It’s usually $50). — MF