I recently bought the Vol. 8 from the Code-Z series from Stefan R. Oehl. He is located in Australia and is presently working on a complete series about the Zeds.
Not easy to get, not fro free, but a fantastic book, quite large (Vol. 8 is more than 460 pages and 2 lbs) and very very detailed. I thought I knew everything - I was wrong
and heave learnt ... I even manged to get one of the limited ones.
Here the flyer and some details:
Just though you might be interested.
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The following user(s) said Thank You: TexasKZ, Mikaw