When I contacted RPG Maker for the first 2 sets, I didn't really have plans to make any more.  Seeing their success, I wanted to continue.  Looking for a fitting theme, I settled on the idea of creating many types of slimes.  I created a big sheet of slime monsters and worrying that there weren't enough big monsters in the pack, I decided to create some big dragons to go along with it.  I think all the slimes together took about the same time to make as one or two of the dragons (they are big originals).  Hence the subtitle of "Slimes and Dragons."  I really liked the colorations of the monsters in this pack and some of my personal favorite drawings are found in it.  At the time, I half expected this to be my last pack.  I'm glad it wasn't.