Hmmm... Whilst I am obviously very sorry about all you went through with your sister and so on, I have to say, I don't think she'd approve. I think she'd want you to read the damn thing, whilst you are still here. All of us could be gone tomorrow, so there really is no time like the present.

It would be like me refusing to watch Family Plot because it's the last Alfred Hitchcock film (not one of his best, in fairness, but my point stands). Be a Zafon completist and do it.