A new revised/uncut edition (as I Am Providence: The Life and Times of H.P. Lovecraft) (2 vols) has been issued in 2010 (Hippocampus Press); this restores 150,000 words cut for space reasons from the original edition, and is also thoroughly revised and updated in regard to new information on Lovecraft that has come to light since 1996. It may be considered the last word on Lovecraft biography.
When first published in 1996, H. P. Lovecraft: A Life was regarded as a "meticulously researched"  biography of Lovecraft, taking account of all currently known facts about Lovecraft's life and work. It was met with critical praise; it elicited favorable comments from the horror author Ramsey Campbell and literary critic Harold Bloom,  and received a long and favorable review in The New York Review of Books from author Joyce Carol Oates, who called it "the definitive biography". It supplants earlier efforts such as L. Sprague de Camp's Lovecraft: a Biography (1975), which was widely criticised for a perceived lack of sympathy toward its subject and for numerous errors and omissions.
According to his website, Joshi regards this book his most notable achievement to date, followed by his The Weird Tale.