If you've read The Gormenghast Trilogy, tell me: shall I press on?

I started this series by Mervyn Peake as three volumes under one cover, but quickly gave it up because the book was too heavy to hold up and read in bed.

I could go back to the library and get it in three separate volumes, but should I? What are the indicators that I would or would not consider it worthwhile to plow all the way through this voluminous and apparently very weird set of novels?

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Topics: Gormenghast, Mervyn Peake, novels, weird fiction, reading, literary taste