This is a great book. Osho explains the letter from Tilopa to Naropa part by part, and he managed to write a whole book about it! He might seem a bit redundant on information, which some times is good as you get reminded of information, and some others just seems repetitive. Osho sometimes is quite arrogant, but that is just the way he is. And this books definitely contains some good pearls of wisdom. What I suggest is for you to take the time to immerge yourself into the book, it would be great if you could do it when you have a week off from work when you can do just as it tells you... "do naught with the body, but relax". It helped me heal my insomnia and my sleep schedule became naturally regular from 4AM to 9PM, all full of energy! before hand I had to "naught but relax" in between reading around this book, a book on antioxidants(the antioxidant miracle), and a book on yoga (how yoga works). Then one day I slept til 11PM on a late night yoga class request, and messed up my sleep schedule again for weeks to come, hence I thought... I need more tantra!! It also gives you a certain natural rush of endorphines while you're hands-on it, as tantra is living wholeheartedly in a state of orgasmic joyfulness. Overall good book! enjoy the ride!