What format is trending the strongest in 2019? (Audiobooks, ebooks, or print books?)

Definitely audiobooks. That’s not to say that anything is down with print or digital, but audiobooks and their sales are increasing at a higher rate. It’s similar to what we saw when eBooks first became a major factor in the industry, and there’s no need to panic. As I’m sure many experts will agree, audiobooks will eventually find its own place in the marketplace, and all three formats will live happily side-by-side.