My professor, Brian L. Stuart, was Inferno enthusiast and wrote a great small book on how it all works (We used it for class.) if you've read all of these his book might be interesting.

https://www.amazon.com/Principles-Operating-Systems-Applicat...

(It's also pretty easily available online if you cannot afford or find the hard copy.)

Is the the book you used?http://www.amazon.com/Principles-Operating-Systems-Applicati...