Advice on Unix Internals

[Guy Harris]

>One of the author is Robert McCusik (sp ?) .

Yup.  "Robert" is not the correct spelling for "Marshall Kirk", as in
"Marshall Kirk McKusick".

>He wrote fsck program.

...and the file system that it checks in 4.[23]BSD (although there were
probably a few bits of the old V7 file system's "fsck" lying around in
the 4.[23]BSD one, at least until recently). 

The other authors of the BSD book are Samuel J. Leffler, Michael J. 
Karels, and John S. Quarterman. 

The full title of the book is *The Design and Implementation of the
4.3BSD UNIX(R) Operating System*.  ISBN 0-201-06196-1