Pigs in Heaven (ISBN  ) is a 1993 novel by Barbara Kingsolver; it is the sequel to her first novel, "The Bean Trees".
 It continues the story of Taylor Greer and Turtle, her adopted Cherokee daughter.
 It highlights the strong relationships between mothers and daughters, with special attention given to the customs, history, and present living situation of the Cherokee Nation in Oklahoma.
 It is Kingsolver's first book to appear on the New York Times Best Seller list.
Nautilus Book Awards is an annual accolade of books in the genre of social and environmental justice.
 Established in the U.S. in 1998, it is considered a "major" book award and has been conferred to prominent authors including The Dalai Lama, Deepak Chopra, Barbara Kingsolver, Thich Nhat Hanh, Amy Goodman, Charles, Prince of Wales and Desmund Tutu.
Walker Percy, Obl.S.B.
 (May 28, 1916 – May 10, 1990) was an American author from Covington, Louisiana, whose interests included philosophy and semiotics.
 Percy is known for his philosophical novels set in and around New Orleans, Louisiana, the first of which, "The Moviegoer", won the U.S. National Book Award for Fiction.
 He devoted his literary life to the exploration of "the dislocation of man in the modern age."
 His work displays a combination of existential questioning, Southern sensibility, and deep Catholic faith.
Small Wonder is a collection of 23 essays on environmentalism and social justice by American novelist and biologist Barbara Kingsolver, published in 2002 by Harper Collins.
 It reached number 3 in the "New York Times" non-fiction paperback best seller list in May 2003.
 The cover shows two scarlet macaws, the subject of one of the essays, in flight against a tropical forest.
The Best American Short Stories 2001, a volume in "The Best American Short Stories series", was edited by Katrina Kennison and by guest editor Barbara Kingsolver.
The Lacuna is a 2009 novel by Barbara Kingsolver.
 It is Kingsolver's sixth novel, and won the 2010 Orange Prize for Fiction and the Library of Virginia Literary Award.
 It was shortlisted for the 2011 International IMPAC Dublin Literary Award.
Barbara Kingsolver (born April 8, 1955) is an American novelist, essayist and poet.
 She was raised in rural Kentucky and lived briefly in the Congo in her early childhood.
 Kingsolver earned degrees in biology at DePauw University and the University of Arizona and worked as a freelance writer before she began writing novels.
 Her widely known works include "The Poisonwood Bible", the tale of a missionary family in the Congo, and "Animal, Vegetable, Miracle", a non-fiction account of her family's attempts to eat locally.
The PEN/Bellwether Prize for Socially Engaged Fiction, formerly known as the Bellwether Prize for Fiction is a biennial award given by the PEN American Center and Barbara Kingsolver to a U.S. citizen for a previously unpublished work of fiction that address issues of social justice.
 The prize was established by noted author Barbara Kingsolver, and is funded by her.
 Winning authors receive a $25,000 award and a publishing contract, from which they receive royalties.
Animal Dreams is a 1990 novel by Barbara Kingsolver.
 A woman named Cosima "Codi" Noline returns to her hometown of Grace, Arizona to help her aging father, who is slowly losing his struggle with Alzheimer's disease.
 She takes a biology teacher position at the local high school and lives with her old high school friend, Emelina.
 "Animal Dreams" features Kingsolver's trademark—alternating perspectives throughout the novel.
 Most chapters are told from the perspective of Codi, while others are told from her father, Homer's, perspective.
 The book was dedicated to Ben Linder, who was killed by the Contras on April 28, 1987.
Prodigal Summer (2000) is the fifth novel by American author Barbara Kingsolver.
 Heavily emphasizing ecological themes and her trademark interweaving plots, this novel tells three stories of love, loss and connections in rural Virginia.

Question: What do Walker Percy and Barbara Kingsolver have in common?
Answer: author