I just finished updating the porting book. It is much smaller now but has more info plus it points out GHI’s OSH boards, which I think is the best way to learn porting NETMF.
http://www.ghielectronics.com/downloads/FEZ/Beginners%20Guide%20to%20Porting%20NETMF.pdf
I hope you like it. Enjoy!
… 2 more to go, IoT book and gadgeteer book.