"Xander's Book Challenge"
Summary: Xander finds a Book (Capital B) that within its pages contains the secrets to some special power/ability/world/magick/skill/map/weapons/WHATEVER. He reads this book and
shortly after becomes a master at whatever it would teach him to be and attempts to contribute his new abilities towards the Slaying.
The Book can be about absolutely /ANYTHING/. From Gun sniping to Summoning creatures from Beyond, to reading auras and making him a powerful psychic! Crossovers are allowed, even encouraged. You could make Xander a Wizard from the ...