Interesting. I considered that it would be possible to do something like that, but when I tried adding it to the Water skillbook (by setting the category to the WaterSkillbook) it didn't show up. My plan was to create a custom Object Category that only contained one item and have the boss drop it, but those Treasure Tables just don't work.

Actually, does "b0d4cfdb-71dc-468c-ace7-a558d00z5121" not refer to the corresponding RootTemplate GUID? That's what I was assuming when I copied my book template GUID over into my object stat.

One thing I found out when trying to make a Skillbook is that the mod does *not* use the definitions provided by the Main mod when defining objects. Like this line-
new entry "SKILLBOOK_SummonKickstarterPetWhitecat"
type "Object"
using "_Skillbooks"
data "Act part" "6"
data "Requirements" "Level 4"

If that is in a mod's Object.txt by itself, then it would fail because "_Skillbooks" isn't defined in that same text file. I don't think Treasuretables get imported either for use (though that appears moot until we can point RootTemplates towards our own TreasureTables).