Barton Levi St-Armand’s “H. P. Lovecraft : New England Decadent” (1975) is now online for free at Persee, as part of their digitisation of the literary journal Caliban. No. 12, 1975 was a special issue on American science-fiction, and its long article on Lovecraft as a “New England Decadent” was an important item of early Lovecraft scholarship.
“New England Decadent” had been issued as an ebook fundraiser for the WaterFire Providence festival, in connection with NecronomiCon 2013…
WaterFire Providence is re-publishing, H.P. Lovecraft: New England Decadent by Professor Emeritus Barton Levi St. Armand. First published in 1979, the book, which examines the history of Lovecraft scholarship and his roots in the decadent movement of 19th Century Britain and Europe, has been corrected and re-released for NecronomiCon Providence 2013.
… but this edition later vanished from Amazon sometime in late summer 2018. Presumably the permission for an ebook only lasted five years.
It must have been made available in print as well in 2013, because I bought a reprint on February 19, 2014. I cannot locate my copy at the moment, but as I recall, there were a couple of OCR issues with it.