Yes. Before resorting to unauthorized PDFs, consider these ethical alternatives:
Myles Munroe’s primary publisher is FaithWords (a division of Hachette). They occasionally offer promotional free PDFs or sampler chapters. Visiting their website and signing up for newsletters can yield legal, free extracts.
Google Play allows you to read books in a browser or app. They provide an "Adobe DRM" option that sometimes allows PDF printing. This is a legal source for The Purpose and Power of the Holy Spirit and others.