Hey there Terijo,
So glad that I was able to answer some of your questions.
Wayyy out there, but some really great books on shamanism that you might enjoy that have lots of great information and healing stuff in them for the head is Lynn Andrews. the first book is Medicine woman and this will lay the foundations of some amazing ceremonies and just things..
I can't really think of any healing books per se.. What types of reiki do you use and what level are you? Don't sweat all that levels of the aura stuff that she puts in there.. Its way above many peoples head and you will find as you use the energies, you will tune in naturally to some of these levels..
I like the visualization.. I use that as I see fit and it seems to come in waves as to when I use it.. For a while I was brushing everyone down..That was really cool and the client really vibrates for a while after you are done..
Love and Light my sister!
Jahnavi