It's about a disabled man that is transported to a fantasy world when he sleeps. While there, he is able-bodied and a powerful sorcerer. Each time he goes there, it is harder for him to return to the real world. Sound familiar?

Sounds a bit like the summary of one of the books my dad has, but damned if I can recall a title. (And it'd be in Dutch anyhow)

If no one here can turn up a title for you, can I suggest going to the 'Name That Book' for help? They seem to have a pretty high success rate with answered queries at least. ^-^

I know that's not particularly helpful, but hopefully it's of some use all the same!

Are you sure it is a man? That sounds vaguely like Farworld, but protagonist there is like 13 or something (although also male).

Dear jogong,
The story you're looking for doesn't happen to be The Chronicles of Thomas Covanent by Stephen Donaldson does it????

unorna.

I thought it was Thomas Covanent also. Is the disability leprosy, loss of fingers?