As a player who is currently going through the 1st adventure, I have a vested interest in knowing more about this. Now, thanks to some peeking at the magazine (shame on me) I already know thatgfunk said:The Adventure Path is quite the meatgrinder. Perhaps not on the scale of RtToEE, but deadly. The climactic encounters of each module, particularly the 1st and 4th can easily result in TPKs.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.