Hi Andii, Thanks for your reply. I wrote a book on this subject last year. 267 pages. I have no real problem with content because I am teaching a certification course, so I bought a copy of the certification curriculum, and am working from that and adjusting the content to make concepts clearer. I spoke recently to someone who has also published courses here on the same subject. 3-6 months seems about average because of the breadth and depth of the content, so I seem to be on track. Oh well, no free suppers, as they say. Hope things improve for you over there soon. We've got a family from Zaporizhzhia living with us, desperately wanting to go home, but afraid for their child. Good Luck
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