I'm reminded of Lovecraft, who would use a thesaurus to pad his paid-by-the-word word counts by inserting various adjectives that sounded scary but didn't actually mean anything in context.
A while back, a friend and I both bought a copy of the complete works of Lovecraft; a single volume. It's a pretty thick book, but I was surprised it was just one book. For all the influence he had, all the diverse tales of horror, it all fit in one volume... with a reasonably large font-size at that. I remarked to my friend about this. Call him influential, but I'm not sure I'd call Lovecraft "prolific".
I'd liken it to trying to read a book written in calligraphy. Here's an example of what to expect:
>In youth he had felt the hidden beauty and ecstasy of things, and had been a poet; but poverty and sorrow and exile had turned his gaze in darker directions, and he had thrilled at the imputations of evil in the world around. Daily life had for him come to be a phantasmagoria of macabre shadow-studies; now glittering and leering with concealed rottenness as in Beardsley's best manner, now hinting terrors behind the commonest shapes and objects as in the subtler and less obvious work of Gustave Dore. He would often regard it as merciful that most persons of high Intelligence jeer at the inmost mysteries; for, he argued, if superior minds were ever placed in fullest contact with the secrets preserved by ancient and lowly cults, the resultant abnormalities would soon not only wreck the world, but threaten the very integrity of the universe. All this reflection was no doubt morbid, but keen logic and a deep sense of humour ably offset it. Malone was satisfied to let his notions remain as half-spied and forbidden visions to be lightly played with; and hysteria came only when duty flung him into a hell of revelation too sudden and insidious to escape.
(It does raise the question of to what extent good writing relates to the author trying to write well. E.g. I found the "author's preferred text" of American Gods verbose and meandering, and suspect that the original release was superior, even though Gaiman regards it as having been excessively edited for commercial reasons)