Opancerzenie 
Spellbook of Dark Mysteries
It increases your Magic Level by 3. It's no longer obtained through The Demon Oak Quest.
Obtainable through The Inquisition Quest....
Spellbook of Enlightenment
It's the most common spellbook that gives +1 magic level....
Spellbook of Lost Souls
This spellbook isn't quite rare, after the Update '08 Lost Soul dropped this spellbook for a very short time too. This spellbook gives +2 magic levels...
Spellbook of Mind Control
This item used to be really rare because it was only dropped by Yaga the Crone. After Updates/8.4, you can also loot it from many other strong creatur...
Spellbook of the Novice
The weakest spellbook of all. You receive it on the Dawnport to practice Druid and Sorcerer vocations. It's advised to switch it with a Wooden Shield ...
Spellbook of Vigilance
Spellbook of Warding
Once had the highest defense of any spellbook in the game until Depth Scutum was introduced into the game.
Obtainable in the The Thieves Guild Quest....
Spellscroll of Prophecies
It increases your magic level by 3. It has weaker defense than a Wooden Shield....
Spellweaver's Robe
Somewhat better than a Lightning Robe....
Spike Shield
New item implemented in the Winter Update 2012. It has the same defense as the Bonelord Shield but it weighs more and usually costs less....
Spirit Bind
Obtainable in The Elemental Spheres Quest....
Spirit Cloak
This is one of three Mage's armors that increases Magic Level by 1, yet carries no minimum Level requirements. Compared to either a Focus Cape or an E...
Spirit Guide
Spiritthorn Armor
Part of the Spiritthorn Set. It is a possible reward of the Primal Ordeal Quest, which guarantees one random item from the Primal Set through the Haza...
Spiritthorn Helmet
Spiritthorn Ring
Part of the Spiritthorn Set. You can Charged Spiritthorn Ring it at Cledwyn for 5 Silver Tokens.
It is a possible reward of the Primal Ordeal Quest...
Stag Boots
Stag Footwraps
Stag Helmet
Stag Legs