I love black and white, ink and line drawings.  This pack is unlike the others, and is an experiment in shapes and silhouettes.  I don't think it took terrible long to make, but I had artistically a lot of fun making it.  Sales were always low on this pack, so I came back about a year later and added a glowing red version of each monster, effectively doubling the usable monsters in the pack.  I'd like to see some used as logos or game box art, or as a shadowy version of an enemy.