HarperCollins Reading Group Guides Discussion guides for various fiction, nonfiction, and classic Harper Collins titles

Penguin/Putnam Reading Guides Discussion guides for titles from Penguin and Putnam titles, plus tips on starting a reading group

Random House Reading Group Guides Discussion guides for various titles from the following publishing groups: Anchor, Ballentine, Bantam, Dell, Doubleday, Knopf, Pantheon, Random House, Schocken, and Vintage

Reading Group Choices This site offers suggested titles for book clubs, a searchable database of discussion guides, and advice for starting and leading your own reading group
 

Reading Group Guides This site offers reading suggestions and discussion guides, and ideas and advice for starting and running a reading group

Simon & Schuster Book Club Reader Reading group guides for Simon & Schuster titles, plus an online discussion forum for your favorites

St. Martin's Press Reading Guides Guides for titles published by St. Martin's and Picador USA

W.W. Norton Reading Guides Discussion guides for various W.W. Norton titles