Mood in The Cask of Amontillado

For an excellent discussion of Poe's ability to create and maintain a mood of suspense and morbidity, I found this review of mood in "The Cask of Amontillado". Overall "The Cask of Amontillado" is an excellent exploration into the human mind and heart.  It is a diversion from regular murder mysteries in that the killer states his purpose in the first line and reveals his identity.