> > Read the daemon book (Design of the 4.4 BSD system), and perhaps Bach's
> 
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Could you explore me, please, how to obtain this book today ? I don't found
> this in amazon.com and so on (URL is more acceptebly).

http://www.amazon.com/exec/obidos/ASIN/0201549794/qid=955993603/sr=1-5/002-7993847-0617049

The Design and Implementation of the 4.4BSD Operating System (Unix and Open Systems Series.) 
by Marshall Kirk McKusick (Editor), Keith Bostic, Michael J. Karels (Editor) 
List Price: $57.95
Our Price: $47.99
You Save: $9.96 (17%)

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Hardcover 2 edition (May 1996) 
Addison-Wesley Pub Co; ISBN: 0201549794 ; Dimensions (in inches): 1.38 x 9.47 x 6.60 
Amazon.com Sales Rank: 7,021 

-allen