Anyone read this book?

I found it to be very helpful and quite true in the ways of dreaming, i read about some techniques there years after i have been practising them and discovered by myself in dreams. But I am primarily interested in two of its aspects of whether someone else has allready tried them.

1) seeing energy and knowing if the dream is just a dream or a deeper voyage into the astral realms. Also following other beings from our dream after we have discovered them. I've tried seeing energy only few times and seen it couple of times , the last time i focused on a purple blob of energy after which i flew through colorful tunnels and ended up in a rainbow color made cave with other blobs of energy. After which i decided its best not to risk it any further and wake up.. which happened in a way that i felt my energy returning back through that tunnel while being half awoken and seeing a bit of my room.

2) falling asleep inside the dream and fortifying the dream even further. This i managed only once to lie down in the dream and relax which made it more solid. But the last time i entered a very solid dream which felt off this world i tried falling asleep inside of it.. but this time this only made me more aware of my sleeping body and i entered a less focused dream.

If not about these two specific issues i'd like to know what other people think of this book and how it has worked for them.