Through the Gates of the Silver Key: A Horror, Post-1930 Classic By H. P. Lovecraft! AAA+++

The concepts Lovecraft puts forth in this story are nothing short of genius. While his writing can certainly be classified as horror, it's also important for fellow sci fans to take well deserved notice of him. This story (written over 80 years ago, mind you) has quantum concepts, alternate realities, extradimensional entities, moments of revelation that rival and even exceed some of the best sci fi i have ever read - not to mention an exceptionally lucid, comprehensible, yet appropriately alien descriptive style that only the best of authors could pull off.