An Arcanabula, sometimes known as an orizon, is the term used for a wizard’s working spellbook; often a hodgepodge of spells (including some that were unusable by the author) and research notes for both the completed spells therein and for spell concepts still in progress. An arcanabula differs in concept from a "travelling spellbook" in that the latter is generally a distilled copy of one or more arcanabulae, lacking the research notes for the sake of compactness, though most travelling spellbooks with blank pages remaining almost inevitably become aracanabulae.