You can now get a PDF (digital) copy of the CK Holliday Plans Engine Study Book in addition to the hard copy. This is a 1:1 PDF copy of the 2nd printing of the plan book, with no printing restrictions or watermarks. The PDF book is immediately available for download once you complete the purchase. You can get it right here.
On another note, I just now noticed that while you can leave comments, they do not show anymore. Sorry about that, this isn’t intentional and I’ll look into it.