Scribe
Legend
But how is Spelljammer not a setting book?
In comparison to Eberron?
Its an Adventure. - Book 1.
Its a Monster Book. - Book 2.
Its an absolutely tiny slice of setting basics, player options, and some ships. - Book 3.
Again, compare it to the only real setting book of the edition. Its not comparable. Its like saying SCAG is a setting book for the Forgotten Realms.
Now, again, I found Eberron overwhelming, far too much, but when someone says 'Setting Book', they mean that. They dont mean SCAG, and they dont mean Spelljammer, which many many (not me) people found inadequate as a setting set of books.