I just used this guide this weekend to acquire my Felhunter and it worked out very well! Thank you again for excellent information, Akasha. If I could I would like to add a few points for other players like me that may be new to the game or just need an extra hint or two(like me)

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1. Refer to the maps that come with this guide! The dotted pathlines helped a lot. Since I already had the flight plan to Ratchet from the Succubus quest, I just flew in so that part was easy. But the map with the path from Dustwallow Marsh to the Great Lifts was invaluable. It helped that I had it printed out so I didn't have to stop and pull up the ingame map too.
2. If you don't want to fight your way through the camps of Murlocs to get to the camp with the book, you can follow along on the edge of the cliff overlooking the beach until you reach the correct camp. I solo'd the entire quest chain and didn't have help at the Murloc Camp. Most of the Murlocs were ranged so I found it impossible to pull them by one's or two's. The entire camp would come running. I died twice until I figured out to send in the voidwalker and let him get as much aggro as possible from the entire camp. While everyone was focused on him I dashed in and grabbed the book. Others probably thought of this way before I did, but like I said I need an extra hint or two.
3. At the Great Lifts, a lovely warrior had already killed the guards for me so I don't know if this is true or not, but PVE Allies be aware that you may be flagged PVP after killing them. I read that on another site, so again I'm not sure how true it is. But there will be Horde questing in the area so be on guard or hide out until it wears off.
4. Again, if you consult the map then you won't have the trouble I did- but go
right when you get off the lift! If you hug the cliff wall like the guide says you can get all the way to the cave without aggroing just about anything even when you pass the Centaur village. I had to fight one centaur that was directly in my path, but that's it.
5. Once in the cave, be aware that if you get lost(like I did) there is another chest in the cave. However if you mouse over it, it says something other than "damaged chest". Do not spend 20 minutes trying to jump up on the ledge and get it whilst fighting off respawns. Eventually I figured it out and went back to the front of the cave and followed the correct direction. Also hearthing is a time saver once you get your loot.
6. Have you figured out by now that I like sneaking around instead of blasting my way through the middle? Soooo... at the Dragonmaw camp back in the Wetlands if you run along and on top of the hills between the road and the camp coming from the direction of Menethil Harbor, almost at the end of the camp there are two tents. Under the tents are two casters with minions. I cleared the two non-caster adds in front of the tent and then sent the VW in to aggro the two casters and their minions. I'm going Demon spec so I do have the Imp VW and he held the aggro like a charm while I Dotted everyone up and then nuked them one by one. They both dropped rods so I just ran back the way I came until I saw another caster with only one add underneath a tent. He dropped a rod too(yay!). All done. I only mention this because there was another Warlock in the camp who was grantedly kicking butts and taking names; but he was fighting all the non-casters and their adds to get to one caster and kept having to sacrifice his VW to run off. He was still there when I left.
I just wanted to point out some of the mistakes I made or things that confused me in the hopes that they can help someone else doing the quest later. One more thing-This Felhunter is the ugliest thing I have ever seen. I had quite a giggle running through IF with him and seeing newbies back up when they thought they were being attacked.
