I just finished reading "Insurgence" by Frank Viola and he made several references to Michael Heiser's "Unseen Realm..." It piqued my interest, so knowing that it was a Lexham Press book, I looked it up on Logos and it was $24.95. Amazon has it on the Kindle for $2.99. With books from other publishers, I can understand the price discrepancy, but this leaves me baffled and irritated. Can anyone explain this to me?