Ellis Sharp at The Sharp Side was the blogger who got me actively interested in Lowry's fiction. It's clear that he's something of a favourite of his. Read his take on Lunar Caustic, a novella, and the novel popularly considered Lowry's best, Under the Volcano, which includes commentary on one of his lesser known works, as well as related books.
Other interesting links:
Through a glass darkly - A Guardian article by John Hartley Williams in which focuses primarily on Under the Volcano as well as Lowry's other works, including his poetry, with a biographical approach.
More than most writers, the circumstances of Malcolm Lowry's death are peculiarly relevant to a consideration of his work, since excess of every kind was both his method and his subject.Malcolm Lowry's Under the Volcano - A site on his works that I somehow missed the first time around. It includes chapter summaries and a historical overview of the major work, along with a selected bibliography of his fiction and of criticism on his works, and information on a documentary.
Excerpt from Dark as the Grave - Two paragraphs from the novel, Dark as the Grave Wherein My Friend is Laid. (via Wikipedia)
ArtandCulture artist - Read a bit on the similarities between Under the Volcano and Don Quixote.
Malcolm Lowry and the Northern Tradition - An essay by Hallvard Dahlie. He argues how novelists like Lowry's in their fiction depict
the various ways in which Canada is being transformed from fact into imagination. These novelists have taken the "facts" about Canada - its geography, history, and culture - and created out of them a distinctive mythology which is unmistakably connected to the northern, the frontier, the paradisaical aspects of Canada, and have forged in a relatively short period of time both a tradition and a fictional mode which are significantly different from any earlier movements in our literature.The Political Strand in Malcolm Lowry's Under the Volcano - An essay by Tom Middlebro'. In the second paragraph alone we have mentions of Thomas Mann, Faust, St. Augustine, Nietzsche, Schoenberg and Joseph Goebbels.
There are probably more Lowry articles on the Studies in Canadian Literature site but its search feature is broken. Curious as to why Lowry's on a Can Lit site? You silly, I thought everyone knew that Lowry spent the best years of his life in and set "much of his later fiction" in British Columbia.
Further thoughts on the Malcolm Lowry connection - Graham Collier, "Britain's most original jazz talent", writes an intriguing piece on how Lowry's fictions have influenced his compositions.
And if you need any ideas as to where to go next after reading his entire oeuvre here's a handy Literature-Map guide.