Hint books? I've always been too cheap.
I know they're all available online now, so maybe I'll have to take a look. I didn't find any of them to be too hard. I didn't finish due to lack of free time and eventually waning interest. It was the same for the Baldur's Gate and Icewind Dale games.
I really liked all the mapping.
What can I say - at least I had something to show my friends when it was all done.