The Gift of Asher Lev is a novel by Chaim Potok, published in 1990.
 It is a sequel to Potok's novel "My Name Is Asher Lev" (1972).
Chaim Potok (February 17, 1929 – July 23, 2002) was an American Jewish author and rabbi.
 Potok is most famous for his first book "The Chosen" (1967), which was listed on "The New York Times’" best seller list for 39 weeks and sold more than 3,400,000 copies.
The Zane Grey Museum in Lackawaxen Township, Pennsylvania, United States, is a former residence of the author Zane Grey and is now maintained as a museum and operated by the National Park Service (NPS).
 It is located on the upper Delaware River and is on the National Register of Historic Places.
 It contains many photographs, artworks, books, furnishings, and other objects of interest associated with Grey and his family.
Romer Zane Grey (October 1, 1909 - March 8, 1976) was the eldest son of novelist Zane Grey.
 Romer was born October 1, 1909 at Lackawaxen, Penn.
 Zane and Dolly Grey had three children: Romer, Betty, and Loren.
 Romer was named after an uncle Romer Carl Grey, known as Reddy Grey.
Pearl Zane Grey (January 31, 1872 – October 23, 1939) was an American dentist and author best known for his popular adventure novels and stories associated with the Western genre in literature and the arts; he idealized the American frontier. "
Riders of the Purple Sage" (1912) was his best-selling book.
 In addition to the commercial success of his printed works, they had second lives and continuing influence when adapted as films and television productions.
 His novels and short stories have been adapted into 112 films, two television episodes, and a television series, "Dick Powell's Zane Grey Theater".
My Name Is Asher Lev is a novel by Chaim Potok, an American author and rabbi.
 The book's protagonist is Asher Lev, a Hasidic Jewish boy in New York City.
 Asher is a loner with artistic inclinations.
 His art, however, causes conflicts with his family and other members of his community.
 The book follows Asher's maturity as both an artist and a Jew.
Davita's Harp is a novel by Chaim Potok, published in 1985.
 It is the only one of Potok's full-length novels to feature a female protagonist.
Wanderings: Chaim Potok's History of the Jews (ISBN  ) was first published in 1978 by Alfred A. Knopf, New York.
 According to S. Lillian Kremer in "Dictionary of Literary Biography", The book is "a compendium of scholarship about Jewish civilization and its relation to the myriad cultures with which Judaism has come into contact."
The Zane Grey Cabin on the Rogue River in Oregon is a cabin built in 1926 by Zane Grey (1872–1939), the master author of the American West.
 Grey used it as a frequent retreat until 1935.
The Philadelphia Jewish Voice is a monthly online journal that addresses the critical social and political issues facing the Jewish community of the metropolitan Philadelphia area and beyond.
 Founded in the summer of 2005, "Philadelphia Jewish Voice" functions as a non-profit corporation and is staffed entirely by volunteers committed to reflecting the diversity of opinion within the Jewish community.
 Subscriptions are free.
 The current editor-in-chief is Adena Potok, widow of the author Chaim Potok.

Question: Which profession did Zane Grey and Chaim Potok share?
Answer: author