Had a go at it and got a bit further on with the moment when Gideon meets the devil about to be described. Before he slips into the Black Jaws he gets entangled romantically with Elsie, his old friend telling her that he loves her, and then has to disappoint fellow minister Lorna who reveals she has fallen in love with him.
But it is the moment he falls into the Black Jaws that he starts to get more interesting. The problem is that as a result of the mysterious start you know what is going to happen and that really is the main criticism.
The only real mystery is why Mack was seen after he had died but presumably his testament had been completed before that. Equally there is going to be some reaction presumably from Elsie and John, Gideon’s old friends, but getting through another hundred pages to get there is slow going.