I started reading Titus Groan a long long time ago and I found it hard going but it was an incredibly rich and descriptive book. I started it because one of my favourite artists Rodney Matthews did a series of art prints from the book. I have just tried to get some google hits on that but failed. Its in his 2nd book I think - last ship home. I remember long lost rooms in Gormenghast where there was thick dust on the floors and it was all very gothic.