IMO, the best rune library around is the Cove Fort Rune Library. Take the moongate to Cove and head Northwest to reach the town entrance, but keep heading North from that point, you'll see a large tower, a villa, a large L-shape house and finally the Cove Fort Rune Library. Another easy one to get to is the rune library just south of Moonglow, between the Southern entrance and the moongate. There's a log cabin vendor house, and a sandstone right next to it with said library.
Good places for making gold using a provo mage: Arctic Ogre Lords (inside Ice dungeon and outside Ice dungeon on T2A side), Wrong executioners, Despise ogre lords. You will get PKd at all 3 spots (although it's much harder for them at Wrong executioners if you get a good feel for the area) but you will make more gold than you lose.
Cove for library... Executioners, ogre lords, blood elementals, destard, ballrons and theratam avengers. To start, cyclops valley is very nice.
KoS has libraries just south of Yew Gate, at the city gates of Cove, and by the Yew graveyard. People copy them all the time. Cyclops Valley & Arctic Ogre Lords...T2A side. http://uorforum.com/threads/public-rune-library-thee-hall-of-heroes-detect-hidden-training.17345/ http://uorforum.com/threads/kos-cove-rune-library.14665/ http://uorforum.com/threads/rune-library-kos.4711/
Libraries: Cove's just outside cove's gate Ocllo shop next to bank Ocllo sandtones next to stables Moonglow's just south of main entrance To name the ones I use/used most and find very complete Hunting spots > You can check at those libraries books named HotSpots, High End, and so and you will find lots of places. Bare in mind that, as names indicates, those will be hot areas where you certainly will get chased/killed by pks, but if you bank often you will end up gaining far more gold than you loose on a provo mage. Travel light, bank often and have an alt to open gates (if you can) and resu quickly.
By far the most historic and visited rune library is Dalavar's Fortress outside of Cove. If you need to be friended to this location, just shoot me a message and we can arrange a time to meet up, as it add some convenience and safety to be friended.