We think this is the finest complete collection of Lovecraft's works, and naturally this edition recently went out of print. All of HPL's stories are collected here (with the exception of his collaborations and ghost-written stories), edited with exhaustive precision by Lovecraft scholar S.T. Joshi. It features everything from the extant stories he wrote as a small child to his final work, "The Haunter of the Dark".
This hardback collection is the 2011 silver edged, purple bookmark edition (this includes a number of corrections from the 2008 edition). It is no longer in print, but we were able to acquire a few new copies of it. At 1,098 pages, this is likely to be the biggest edition of Lovecraft you'll ever own, and should you be stranded on a desert island, this will be the one you'll want to have with you.