It's an amazing story that's for sure. I first started reading the covenant series when I was about 18. My b/f at the time got me started on them.
When I left him, I stole his covenant books.
Those ones have since fallen apart or not been returned after loaning, so I've got fairly new copies of the whole series to date.
I love stephen donaldson as an author. Have you read 'the gap' series? If not, you should have a peek. It's brilliant.