Divine spells can be written down and deciphered just as arcane spells can (see Arcane Magical Writings). Any character with the Spellcraft skill can attempt to decipher the divine magical writing and identify it. However, only characters who have the spell in question (in its divine form) on their class spell list can cast a divine spell from a scroll.
Adding Spells to a Spellbook
Most divine spellcasters pray or perform religious rituals to gain their spells from their deity or spiritual patron; however, a small number of them do use a kind of divine spellbook filled with liturgical prayers, sacred rituals, and methods of calling upon the divine for magic. These divine spellbooks function just as an arcane spellbook, except that only divine spellcasters can use it.