I own all 4 volumes now and this is very well-done. While it retains most of the same graphical style and layout, it is improved upon and there are more interesting articles found within the library of cannabis. There aren't many old-timer strains here, it pushes the envelope to highlight some of the most intense and bizarre hybrids that are floating around there right now. The spectrum of breeders has been widened to allow for more unique variations and excellent photos. If you want to look at Colombian Gold or Skunk#1, then buy volume #1; if you want Jack The Ripper, Querkle, Power Diesel, Cheesus, etc., then this is the right volume for you.