This is the command to download one of the books:

httrack --mirror  --extended-parsing=%P0 --near --test --robots=0 --updatehack  
--cache=C1 --display --extra-log --verbose --search-index
<http://eduunix.ccut.edu.cn/index2/html/unix/Sybex%20Solaris%209%20Sun%20Certified%20System%20Administrator%20Study%20Guide/>

I don't know where to extract the log information..The expected results is a
directory with all the files (you can see them pointing the browser here:

<http://eduunix.ccut.edu.cn/index2/html/unix/Sybex%20Solaris%209%20Sun%20Certified%20System%20Administrator%20Study%20Guide/>
.The software only download ___dtree.css ___dtree.js index.html ___left.htm