We concluded the Wayland Book on our book club.
What do you though of The Wayland Book?
For us who are X11 hackers, what do you think of Wayland after reading it?

Let's also vote for the next book.
These are the candidates:

• The Art of UNIX Programming.
  
• Advanced Programming in the UNIX Environment (a tough book, very terse, dense on information and also very long).
  
• Introduction to Operating Systems Abstractions Using Plan 9.
  
• The Design of the UNIX Operating System.
  
• UNIX: A History and a Memoir (this one is not free, unfortunately).
  

If you have another recommendation, please comment.