I love when drawings interweave, have depth and overlap all over eachother. It's like layers upon layers of scribbles that equal one incredible visual story. My gut tells me that more often than not, this end result is not planned, it just happens as a consequence to sketching in a sketchbook.
This is the work of Jess Worby, a recent member of DA that I just happened upon when browsing through some of the new member profiles. His work is exactly what I describe above, take a look for yourself and definitely welcome him to the site.