The book is excellent as it gives 30 practical methods of self-hypnosis, which are specifically aimed at different complaints. So for example, you get a method particularly good for insomnia, others for stress, others to give energy, others for health. It really is 'step by step' too, with each technique numbered in stages. The way the book is laid out is clear, easy to use and understand, the simplest techniques are at the beginning 'The tick-tock technique' for example, with more 'advanced' and time consuming methods towards the back of the book.
If you want to learn how to hypnotise yourself - then get this book! I have found most of the methods very useful - of course each individual is different. For me the tick-tock technique, the total void, the niagara falls, black fishes, thousand suns, the breath, pitch-black, heaviness, flame and sk techniques all worked a treat.
Because it is really a 'how to' book, there isn't that much on theory and some of the more wacky methods (the author has invented his own 'SK' method & autowriting is in there) get a mention.