I personally do not understand why Logos does not make it mandatory to add actual comments when leaving a review of a book. I believe it would weed out superficial reviewers and, at best, define why someone does not like a book. In the scope of a "theology of worship," this book is an absolute must for anyone's library. I have the print book and I cannot yet justify purchasing the digital edition at the price it is listed, but the book has spawned a great degree of thought in regard to worship and there are very few books available that attempt to dive into a theology of worship. Kudos to Block for the effort and, if the book dropped here to anything under $30 I believe it is a worthwhile investment for your Logos library, but I don't think close to $40 justifies it.