Go on a literary journey around the globe without ever leaving Brooklyn.

The 11th annual Brooklyn Book Festival will take over Downtown Brooklyn on Sept. 18 with more than 200 authors of fiction, nonfiction, graphic novels and poetry from more than 20 countries, including France, Cameroon and Mexico.

“It is a Brooklyn festival, but it is an international festival,” said festival co-producer Liz Koch. “It’s a festival that more and more reflects the diversity of the world that’s New York City and Brooklyn.”

Organizers are expecting 40,000 bibliophiles, from book and magazine publishers to readers, at the free festival. Book festivals like Brooklyn’s “help promote a diverse literary culture, much as independent bookstores do,” said Teddy Wayne, a New York-based author of the novel “Loner,” out Tuesday, who is participating in the festival talk “Youth in Revolt.” “Without them, the literary world would be much more monolithic.”

This year’s festival lineup includes such literary heavyweights as Joyce Carol Oates, Salman Rushdie and Margaret Atwood, as well as up-and-coming writers, like Brooklynite Nicole Dennis-Benn.

“I first attended Brooklyn Book Festival as an emerging writer. It gave me access to resources, such as local bookstores and writing workshops, which I didn’t have access to at the time,” said Dennis-Benn, whose debut novel, “Here Comes the Sun,” came out in July. “My most memorable experience at the Brooklyn Book Festival was meeting Edwidge Danticat for the first time — at a free event, no less!”

Leading up to Sunday’s festival are more than 50 “Bookend Events,” from book readings and author appearances to panel discussions, film screenings and literary games, scheduled at various Brooklyn venues from Sept. 12-18.

Young bookworms will also have a chance to meet their favorite authors and illustrators at the second annual Children’s Day, which will feature family-friendly games, performances and book-themed workshops on Sept. 17.