Barclay begins with an exceptionally clear introduction to help set the stage for understanding the book of Revelation before diving into verse-by-verse commentary. He not only gives us much-needed cultural context, but also explains the genre of apocalyptic literature and clarifies important historical details. Barclay takes perhaps the most difficult-to-understand book of the Bible and breaks it down into a book anyone can understand. 
“No one can shut his eyes to the difficulty of the Revelation. It is the most difficult book in the Bible; but it is infinitely worth studying,” Barclay says in the introduction. 
An excellent companion to the study of Revelation, Barclay’s commentary will help you to make sense of the confusing language and imagery in the last book of the Bible. 
Find a copy of the book here.