Hey, this looks interesting!
It seems there are also other volumes focusing on PC-6001 and 8001 as well. Hopefully they also show up so we can take a look at them.
There is also this story that the book was sold as being written by this high school student, Harumi Takahashi, who went to school by day and developed games by night.
In fact there is no information inside the book concerning who actually wrote it as it seems the publisher itself used Takashi's name for the actual author. On the other hand Wikipedia tells me that it's possible that Yoshinao Mori (working for Natsume maybe?) is the name we're looking for