Uh oh, NO! I will stop you here and I praaay that you haven't already done this.
I will NEVER touch that book or quest again. It destroyed my main character, glitched her out. Made it seem I wasn't really that level... I am devasted I had to delete that. Glitches everywhere.
I was stuck in Sneak Mode, couldn't get out of it. It never even said I was in sneak it just appeared I was and I moved increeeeeedibly slow.
Please, just don't do that stupid book glitch. It isn't worth it

To late I already did and beat the game at level 71 with crap enchantments, lucky my character didn't glitch but I don't regert doing it because sure I got the level 50 achievement by doing this glitch but any other achievement I got legit even dragon slayer because there's really no level requirement to beat the game I think I heard of someone beating their game in mid 20s. I do plan on doing a new play-though no exploiting of any kind, level legit and trying no to do any main quest expect up until I get fus ro doh and maybe dragonrend but I can do fine without dragonrend as I did all the way to level 41.
No whats this thing I'm hearing about book of oblivion about getting gold? or did that guy meant the oghma?
My next play-though which I probably start now no way I can hold of until dg comes out for pc but this time sure I be leveling slow w/o exploiting.
I first started exploiting with the archery trainer in Riverwood, then I stop there until I did the riften speech exploit which took quite a while, and finally well you know what the next one is.
Anyways got of topic sorry.