By far the best reference anyone can hope to find about ants is the following:

• Holldobler, Bert and Wilson, E. O. (1990) The Ants. The Belknap Press of Harvard University Press, Cambridge, Massachusetts. This beautiful book costs approximately $75 but is the most thorough and readable book available. It is often referred to as "the ant bible".
  

Other books:

• Beattie, Andrew (1995) The Evolutionary Ecology of Ant-Plant Mutualisms.
• Doros, Arthur (1987) Ant Cities. Scholastic Inc., New York, New York.
• Holldobler, Bert and Wilson, E. O. (1994) Journey to the Ants. The Belknap Press of Harvard University Press, Cambridge, Massachusetts.
• Hutchins, Ross, E. (1967) The Ant Realm. Dodd, Mead and Company, New York.
• Larson, Mervin and Peggy P. (1965) All About Ants. The world Publishing Co., Cleveland and NY.
• Selsam, Millicent (1967) Questions and Answers about Ants. Uncle Milton Industries, Culver City, CA.
• Shuttlesworth, Dorothy E. (1964) Story of Ants. Doubleday and Co. Inc., Garden City, NY.
• Wilson, Edward O. (1994) The Right Stuff. Island Press/Shearwater Books, Washington, DC.

Magazine articles:

• Brown, James H. et al. (1979) Granivory in Desert Ecosystems. Annual Review of Ecological Systems 10:201-227.
• Chapela, Ignacio H. et al. (1994) Evolutionary History of the Symbiosis Between Fungus-Growing Ants and Their Fungi. Science 266:1691-1697.
• Christ, Thomas O. and Friese, Carl F. (1994) The Use of Ant Nests by Subterranean Termites in Two Semiarid Ecosystems. American Midland Naturalist 131(2):370-373.
• Gordon, Deborah M. (1993) The spatial scale of seed collection by harvester ants. Oecologia 95:479-487.
• Holldobler, Bert (1971) Communication Between Ants and Their Guests. Scientific American 224(3):86-93.
• Johnson, Robert A. (1996) Arizona Ants. Arizona Wildlife Views 39(6):2-5.
• Knoch, Tom R. et al. (1993) Endophytic fungi alter foraging and dispersal by desert ants. Oecologia 95:470-473.
• Topoff, Howard (1990) Slave-making Ants. American Scientist 78:520-528.