Haven't read AT THE MOUNTAINS OF MADNESS yet (I don't think anyway, they kind of run together??), although I have yet to be disappointed by any of his works. Be prepared to be patient, Lovecraft is more akin to Shakespeare than King. You have to take your time reading Lovecraft and many times you will re-read a sentence or paragraph for clarity. However I find his writing very poetic, much like Poe, and it is well worth the extra effort. As noted, many of Lovecraft's stories deal with similar themes, and you may feel like he repeating himself somewhat from story to story.

SWAN SONG is by Robert McCammon. Personally I am a big McCammon fan but alot of his critics consider him a King copycat. I don't think that's entirely fair, although when you consider both of their catalogues, the charge is not totally without merit. You could sorta consider SWAN SONG McCammon's version of the THE STAND, although what first appealed to me about it was the book was the disaster at the beginning, a nuclear war between the U.S. and U.S.S.R. The topic almost seems dated now, but is handled very well in the book. Post war, a supernatural battle between ultimate good and evil arises. Certain characters in the book are given special powers based on their good/evil alignment. I thought it was a good read, but greatly preferred the first half (the bomb dropping and aftermath) over the second half of the book.