Another recommendation on the print market from one of the comments on the blog:
A great book (although I don't agree with 100% of it) for people who
want to investigate the reproduction/print market is "How To Profit In
The Art Print Market" by Barney Davey. (P.S. I
don't get any commissions!). Its a great beginning tool for an insight
into the print market!–Warren Koch, CWK Productions Ltd.