I've read many books on bodybuilding and exercise science, but this book is a whole different animal. Naturally enhanced is hands down the BEST book on the market for getting that yoked and monster look without actually injecting yourself every morning. The 6 essential groups mentioned MUST be developed when you are a drug-free lifter, but when you get them to an appreciable size then you will automatically stand out in any crowd. The only downside of this program is that people will be calling you out on taking drugs, but that means that you are doing something right so if anything that's a positive. Naturally enhanced helped me pack on a solid inch to my neck, glutes and forearms in only 8 weeks, not to mention that my posterior chain is a lot stronger as well. If you are really serious about packing on as much size as humanly possible without drugs then you would be an idiot to sleep on this book, period.