Good post, however I wonder how much the reader’s expectation after reading the “masterpiece” book influences the judgment of the following books. Often readers want more of the same.
All too often, I'm afraid, especially if that "masterpiece" was the first work by that writer that the reader has encountered.
For myself, I have found myself returning to writers whose "masterpiece" I had read, - especially if that was the first work of their I had encountered - and, time after time, I have found myself hoping (in vain, alas) for the quality of that work to be repeated in subsequent published works.
Alas, it never is.
Hope springs eternal, and all that, but I keep trying, and I keep suffering disappointment.
Now, it is not - in many cases - that the subsequent works aren't good.
They are.
It is just that they are nowhere nearly as good as the "masterpiece".
And then, after a while, (after many years and many books, someday, in the shower, or, just thinking about things - perhaps in bed - or while listening to music) it belatedly dawns on you that these people had it in them to write one outstanding work, - but no more - and that to expect this standard to be met again in the future is wildly and impossibly optimistic, and that it is better to accept that they surpassed themselves once, rather than hope that they may repeat the exercise once more during what remains of their writing lives, or their writing career.
And that, then, means one of two things for the reader:
You can accept that the "masterpiece" is almost an aberration, or an alchemy of something unexpectedly wonderful, but can reluctantly accept that this is not that writer's habitual level, or normal standard.
That means that you can still revere the "masterpiece", - and indeed, re-visit it - but that you can also allow yourself to forget about trying the author's new works, to ignore them, or forget about torturing yourself when new works fail to meet the standard of the work that you had fallen in love with.
Or, you can choose to continue reading what that author writes, but secure in the knowledge that there is no way that this work will come anywhere near their acknowledged "masterpiece" (often the author's most popular and best loved work, and often a work that became an unexpected success through "word of mouth" recommendations, after which the various literary establishments belatedly discover them).