Deep Cuts has a useful post surveying the response of Lovecraft to the new talent of C. L. Moore, toward the end of his life.

M.C. Tuggle has a short review of S.T. Joshi’s new book The Recognition of H.P. Lovecraft.

And S.T. Joshi’s blog has updated, including further confirmation on the two Letters volumes planned for 2022…

this year we do hope to get out at least two other Lovecraft letters volumes: Letters to Woodburn Harris and Others (including letters to Zealia Bishop and others), and Miscellaneous Letters (a huge volume of letters to a wide array of individuals, as well as letters published in Lovecraft’s lifetime).

Also very tantalising is news of…

“Ellen Greenham’s fascinating book After Engulfment, a study of Lovecraft’s cosmicism and how it was adapted or amended” by later science-fiction writers.

However, this is still only at the copyediting stage. I assume the author is aware of the influence on Arthur C. Clarke, though Joshi doesn’t mention him in the list of influenced writers.