Shard O'Glase said:
I forget the term, maybe spellbook capture?
Anyhoo it lets you turn a captured/aquired spellbook into your own spellbook so you can use spells from it. Its like a DC 25+highest spell level check. Not a nig FR guru so I don't knw the specifics.
That rule is in Magic of Faerun (pages 172-173). It's called "masterign a foreign spellbook" -- it allows you to understand the personal notation, script, etc, of the wizard who wrote the book, well enough to prepare spells from it as if it were your own.
It's a nonmagical process requiring a 10 days, plus 1 day per spell contained in the book; a spellcraft check is made, against a DC of 25 + highest spell level in teh book.
If you succeed, you've figured out the ciphers, notations, and whatnot that are used in that book, and you may then prepare spells from that book, without further spellcraft checks -- for life.
If you fail, you cannot retry until you have gained at least 1 additional rank of spellcraft (which means no taking 20).
Mind you, even Taking 10 isn't a guarantee of success; a spellbook with only 5th and lower level spells would have a DC of 30, meaning you'd have to have a +20 spellcraft to pull it off; even assuming Greater Skill Focus (Spellcraft), you'd probably need to be 7th or 8th level before you could do that (10 or 11 ranks, +4 from the feat, +5 or +1 from Intelligence (respectively)), AND that supposes a darned smart wizard, anyway.