To keep a long story short I have a Christian background, live in the West and I know very little about Mahayana Buddhism Doctrine or Sutras.
TLDR; I'm looking for books on Dharmakaya because a monk told me to read a book about it in a dream, and I have not come across this concept before.
Longer story below...
I received a large painting of Guan Yin as a gift. I'd come across Guan Yin before and read a few stories but that was about it.
Being curious, I decided to research a bit and came across the Daily Recitations/Liturgy used in Chan that includes the Surangama mantra, the Great Compassion Mantra, and the Ten Small Mantras. I listened to them and started to recite them for a few days to see if they could help with some issues I was going through.
After a couple of days I had a dream.
I was in a Buddhist temple grounds with statues and buildings everywhere. It was also for communal use I believe. It was a fairly big campus like atmosphere.
I went to a classroom run by a Buddhist Monk, I was the only adult in a class of teenagers. There were questions given out and I tried to answer them. At the end of class I was given the assignment to read about something called "Dharmakaya", and that I needed to see the teacher after class and borrow the book on the subject.
I then proceeded to leave the temple grounds, and when I got to the gates I realized I had forgotten the book on "Dharmakaya" that had been assigned to me.
I returned to the classroom area but the area had become a place where a celebration or a feast was happening. All the members (monks and lay people) were setting up for a party or feast and the teacher (monk) couldn't be found. The classroom was also being repurposed for the feast.
So I left the temple grounds without the book. I recall waking up and going back to sleep but I was still looking for the book each time I went to sleep such as going into bookshops and so on looking for it.
The next day, I had that phrase, roughly "dharmakaya" stuck in my head but I had no idea what it meant.
In fact I wasn't sure if I heard correctly so I tried Googling "Dhamma Nikaya" and "Dhammakaya". Nothing jumped out so I left it thinking it was probably just a dream until (I think) the next day.
Then I Googled "Dharmakaya" and found it as a very profound concept in Mahayana Buddhism!
I was blown away by this as I had never heard about this idea before.
As a result of all this I wanted to ask if anyone knows of any good books on the subject of Dharmakaya as this is new to me.