Eman's training with the main openings (book width = 1) of about ten books is finished :
Opening books not being my domain, I needed some stats, some orders of magnitude, to see what their main openings looked like (book width=1), etc.
Based on the above stats, I think I can continue Eman's training even with their secondary openings (book width = 2), with other books, with a newer experience file, etc.