First though I'll explain the situation. I have a friend that's looking to run a Pathfinder Adventure Path. He has experience running other systems, some are even similar to Pathfinder. He's also even played Pathfinder a few times. The group will be about 4 people (not including him). The players all have experience with roleplaying, but some are more experienced than others.
So the question he has, has two parts. What books should he have on hand at the table? Also, what would be a great Adventure Path to run? He's looking for one that has something for all types of players (combat, exploration, npc interaction, even a romance arc is acceptable).
Thank you to anyone that can help answer this.