So what was the answer?
I have read and enjoyed a few of his books, and am familiar with some others which have become films (probably without always realising that they were based on his books).
Googling his bibliography, I come up with Duma Key as a possibility based on word length, but that would involve Y.
I suggest that we try adding a couple more steps (as in one of the earlier versions) but also that we aim to keep the answers a bit more well-known: of course this raises the problem that what appears well known to one person may be off the radar for someone else...!
So, shall we make it 9 steps and see how that goes?