Avoid "spellbook of novel" after novel becomes discovered. Now it will
just be "novel". Prior to discovery, it might be on the list as "book
called whatever" if the player assigns a type name.
Also, make novel become discovered after reading one instead of only via
object identification. It already shows up as "novel" in inventory, but
changing its definition to designate it as not-interesting-to-discover
feels disrespectful to the tribute.
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