These books are great. I needed some abberations that didn't fail. Some suggestions for another book are:
Dungeon Dive - Book of critters for the generic dungeon (Oozes, Undead Goblins, Kobolds etc)
Book of traps - (im not sure if your uber creation abilites extend beyond monsters, but, if they do,I
need traps for
4e)
Random encounters - Wilderness, urban, cave and other places that need a random table for when the players wander.
Tome of poison and disease - Some poisons and diseases that are actually more fun then "+12 vs fortitude, 3d6 poison damage and 1d6 ongoing poison damage"
Kudos on the work as always
-Sporemine