You can find book club guides at publisher and library websites. For example, publishers like Penguin and New York Review Books maintain online lists of titles with downloadable book club guides. You can also check your local library's website or ask a librarian for available reading guides.
Book club reading guides can take a number of forms. They might include a biography of the author, book reviews or background information about the book's setting and characters. Guides also typically include a list of questions for group discussion. Some books, like Oprah's Book Club editions, are published with a self-contained reading guide.