To record an arcane spell in written form, a character uses complex notation that describes the magical forces involved in the spell. The notation constitutes a universal arcane language that wizards have discovered. The writer uses the same system no matter her native language or culture. However, each character uses the system in her own way. Another person's magical writing remains incomprehensible to even the most powerful wizard until she takes time to study and decipher it.
Wizard Spells and Borrowed Spellbooks
A wizard can use a borrowed spellbook to prepare a spell she already knows and has recorded in her own spellbook, but preparation success is not assured. First, the wizard must decipher the writing in the book. Once a spell from another spellcaster's book is deciphered, the reader must make a Spellcraft check (DC 15 + the spell's level) to prepare the spell. If the check succeeds, the wizard can prepare the spell. She must repeat the check to prepare the spell again, no matter how many times she has prepared it before. If the check fails, she cannot try to prepare the spell from the same source again until the next day.
Adding Spells to a Wizard's Spellbook
Wizards can add new spells to their spellbooks through several methods. If a wizard has chosen to specialize in a school of magic, she can learn spells only from schools whose spells she can cast.
Writing a New Spell into a Spellbook
Once a wizard understands a new spell, she can record it into her spellbook.
Replacing and Copying Spellbooks
A wizard can use the procedure for learning a spell to reconstruct a lost spellbook. If she already has a particular spell prepared, she can write it directly into a new book at a cost of 100 shillings per page (as noted in Writing a New Spell into a Spellbook, above). The process wipes the prepared spell from her mind, just as casting it would. If she does not have the spell prepared, she can prepare it from a borrowed spellbook and then write it into a new book.
Selling a Spellbook
Captured spellbooks can be sold for a number of shillings equal to one-half the cost of purchasing and inscribing the spells within it (that is, 50 shillings per page). A spellbook entirely filled within spells (that is, with one hundred pages of spells inscribed in it) is worth 5,000 shillings.
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