Very well written book and the main characters feel real and believeable. I didn't always like them all the time, but then that's part of what makes them believable.

I thought the ending (from the "fifth game" on) was a bit weak, and could have done with some tightening up.

Certainly worth the read, in particular if you have an interest in computer games or the people who make them. Still, this is a book that while it might appeal to geeks isn't for geeks in the way for example "Ready Player One" is. This is a story that is very much about people at the heart of it.