Book Ward

Abjuration
Level: Artificer * 2, Bard * 2, Cleric */Oracle * 2, Sorcerer */Wizard * 2
Components: V, S, M/DF (a drop of clear oil)
Casting Time: 1 Standard Action
Range: touch
Target: one touched object of up to 10 pounds/level
Duration: 1 day/level or until discharged (see text)
Saving Throw: Will negates (harmless, object)
Spell Resistance: Yes (harmless, object)
  As protection from energy, except as noted above and that the spell only protects against acid and fire damage. While the energy protection remains, the item is also completely waterproof (this protection extends to other liquids as well, such as alcohol and oil).