I think that on average I have probably learned - or seen from a new and interesting perspective - around one new idea per chapter from The Earth Transformed - which is pretty good overall. Still only a third of the way through so far though.

They often say that there has never been a really good Lovecraftian movie yet, and I do wonder whether the same is true of Lovecraftian books by other authors sometimes. I tend to prefer short stories rather than novels for horror of any kind. I have read quite a few not-very-good Lovecraftian shorts over the years. There really aren't that many that have stuck with me that ARE good though.

There are some of the classics: Blackwood's The Willows (and, to some extent T Kingfisher's semi-sequel The Hollow Places), and Hope Hodgeson's The House on the Borderlands, and some of Derleth's tales, but I'd struggle to recommend a particular book really.

One of the best Lovecraft fictions in any media that I know of is the BBC The Lovecraft Investigations podcast - which is a modern take on some of his tales but with some other layers to them.