Chinua Achebe ( , born Albert Chinụalụmọgụ Achebe; 16 November 1930 – 21 March 2013) was a Nigerian novelist, poet, professor, and critic.
 His first novel "Things Fall Apart" (1958), often considered his best, is the most widely read book in modern African literature.
 He won the Man Booker International Prize in 2007.
Isidore Okpewho, NNOM (9 November 1941 – 4 September 2016), was a Nigerian novelist and critic.
 He won the 1976 African Arts Prize for Literature, and the 1993 Commonwealth Writers' Prize, Best Book Africa.
Abdelkrim Ghallab (December 31, 1919, in Fes – August 14, 2017) was a Moroccan political journalist, cultural commentator, and novelist.
 He is an important figure both in the literary and political field (editor of the Istiqlal Party daily al-Alam).
 He studied both at the University of Al-Karaouine in Fez and at the University of Cairo, where he took his M.A. in Arabic literature.
 He is the author of five novels and three collections of short stories.
 His best known novel is "Dafann al-m'd (The buried Past)", 1966.
 According to Simon Gikandi his Arabic style is known for its "graceful and at times scholarly classicism".
Simi Bedford is a Nigerian novelist based in Britain.
 Her best-known work is "Yoruba Girl Dancing" (1991), an autobiographical novel about a young Nigerian girl who is sent to England to receive a private school education.
Adaobi Tricia Obinne Nwaubani (born in 1976) is a Nigerian novelist, humorist, essayist and journalist.
 Her debut novel, "I Do Not Come to you by Chance", won the 2010 Commonwealth Writers' Prize for Best First Book (Africa), a Betty Trask First Book award, and was named by the "Washington Post" as one of the Best Books of 2009.
 Nwaubani is the first contemporary African writer on the global stage to have got an international book deal while still living in her home country.
Simon E. Gikandi , born 30 September 1960 , is a Kenyan Literature Professor and Postcolonial scholar.
 He is the Robert Schirmer Professor of English at Princeton University.
 He is perhaps best known for his co-editorship (with Abiola Irele) of "The Cambridge History of African and Caribbean Literature".
 He has also done important work on the modern African novel, and two distinguished African novelists: Chinua Achebe and Ngũgĩ wa Thiong'o.
Sade Adeniran is a Nigerian novelist whose debut novel, "Imagine This", won the 2008 Commonwealth Writers' Prize for Best First Book in Africa.
 "Imagine This" was originally self-published by the author.
 Based in London, she is also a filmmaker.
Behind the Rising Sun is a 1971 war novel by Nigerian novelist and politician Sebastian Okechukwu Mezu.
 The novel was first published by Heinemann, and later reprinted in 1972 as part of the influential African Writers Series.
 The novel explores the events of the Nigerian Civil War (also known as the Biafra War).
 The novel is the first novel to deal with the war, following, and does so from a Biafran perspective.
 The novel suggests that the Nigerian victory in the war was not due to an aptitude by the Nigerian forces, but by the ineptitude of Baifran ability.
 Critic Wendy Griswald documents at least 28 novels that subsequently depict the conflict.
Karen Ann King-Aribisala (born Guyana) is a Nigerian novelist, and short story writer.
 Her collection of stories, "Our Wife and Other Stories" won the 1991 Commonwealth Writers' Prize, Best First Book Africa, and her novel "The Hangman's Game" won 2008 Best Book Africa.
Zaynab Alkali (born 1950 Tura-Wazila, Borno State) is a Nigerian novelist, poet, short story writer.
 She is regarded as the first woman novelist from Northern Nigeria.

Question: Simon Gikandi did important work on this Nigerian novelist, poet, professor, and critic who's first book was titled what?
Answer: "Things Fall Apart"