This spell helps to keep books intact against the ravages of time and the elements. Firstly, it grants a resistance of 5 against all elemental damage, including damage from rain, fire, and so on. Secondly, it causes the book to age very slowly, so that it ages only one year for every 10 years that pass. A moderately powerful caster can keep books safe for his natural lifespan with this spell. The existence of this spell is part of the reason so many lost and ancient tomes manage to survive uncounted aeons forgotten in the pits of lost cities.
This spell can be made permanent at the cost of 100 experience points.