허부대공 1권: ISBN-10 : 8954221459 
허부대공 2권: ISBN-10 : 8954221467 
허부대공 3권: ISBN-10 : 8954222277 
허부대공 4권: ISBN-10 : 8954222285 
허부대공 5권: ISBN-10 : 8954224369 
These books average about 350 something pages each, and the series is not finished, so picking it up seems like no small undertaking.  One of the authors last works, 용검전기, went to 17 volumes!
If you check it out, let us know how the book is.
I got all this info from 
http://www.kyobobook.co.kr.  It's a quick resource for finding out about Korean books.  You have to use Internet Explorer to view the site, though.