Bruce's book on out-of-body experience is the best I've read over the years, and I've read quite a few. All of my out-of-body experiences were not under my control; I had many in childhood and one big one in my late teens. The world has never seemed quite the same; or rather, I feel like I've been let in on a big mystery. For most people, being conscious is an embodied experience. When you're out of the body, however, you see yourself as a coherent, plasma-like field and can go through walls, doors, etc., and the materialist explanation of things seems reductive and diminishing. OBEs are much more fascinating than dreaming and Bruce has some fascinating things to say about OBEs.
For example, I love his explanation of imaginative overlays--that persistent problem of OBE testimony regarding the real world being subject to errors, to object appearing where they're not supposed to be, and so on. As it turns out, once out of the body you can have 360 degree vision, because you're not face-forward, as when embodied. (There's no such thing as front and back, unless you believe it or comfort yourself with an astral form. But how do you orient yourself, say, when you go through a door into the kitchen? Is the sink to the left of you or to the right? If you first thought it was to the left, but flip into spherical sight and then back, but facing the other way around, then you might just imaginatively recreate the sink to your left, to reorient yourself, even though it's actually now to your right. And if you create an imaginary door and then walk through it, you pop out of the realtime zone into the astral dimension and it just gets wilder and wilder from there.
The real benefit of Bruce's book is that he has well thought-out energetic techniques and relaxation exercises for learning to leave your body at will. Now, if I just had time to apply the techniques--and get over my fears....