I work with someone who gets me podcast interviews, but I want to hire the right person for more traditional media - radio, print, magazine, etc. I'm an author, consultant and speaker.
Hello, my first question to you would be - why podcasts? Did you get on that because they were the easier to get started with or did you have a strategic reason for focusing on podcasts firsts?
With that said, your product is not a straight forward promotional material - meaning you can't just take nice photographs of it and give it a catchy phrase and expect it to catch enough interest to get buyers from a magazine print. Podcasts do allow you enough time to talk about your book(s) or expertise but depending on the podcasts promotional outreach and your own for each time you show up in one - there might not be enough traction there.
My name is Humberto, I'm a competitive strategist and have been helping entrepreneurs and business owners for the past 10 years or so, while in most recent years we've added not just consultation but the execution of marketing campaigns for www.Unthink.me. My suggestion would be sharing your expertise through your website, having a blog where you share mockup case studies, chapter sections, build it with good SEO, creating videos, etc. that you control and can share on social media. Inbound and Growth Hack Marketing (which is what you need) is a combination some authors have used to get attention to their content and get people to buy. The idea is simple enough but the execution is key.