Question: How many hardcovers appeared in the number-one position of "The New York Times" Bestseller List by the author of "Night Chills"

Context articles: Before I Go to Sleep
Sarah MacLean
Mother Warriors
Night Chills
List of Fear Street books
Vision in White
Dean Koontz
The Cove (novel)
Doug Stanton
Ally Condie

Before I Go to Sleep is the first novel by S. J. Watson published in Spring 2011.
 It became both a "Sunday Times" and "New York Times" bestseller and has been translated into over 40 languages, and has become a bestseller in France, Canada, Bulgaria and the Netherlands.
 It reached number 7 on the US bestseller list, the highest position for a debut novel by a British author since J. K. Rowling.
 The "New York Times" described the author as an "out-of-nowhere literary sensation".
 He wrote the novel between shifts whilst working as a National Health Service (NHS) audiologist.
Sarah MacLean (born December 17, 1978) is a New York Times bestselling American author of young adult novels and romance novels.
 Her first adult romance novel, "Nine Rules to Break When Romancing a Rake" debuted on the New York Times Bestseller List, where it stayed for four weeks.
 Since then, all of her adult romance novels have been on the New York Times and USA Today bestseller lists.
 Since February 2014, MacLean has written a monthly romance novel review column for The Washington Post.
 She is a two-time winner of the Romance Writers of America RITA Award for Best Historical Romance for "A Rogue by Any Other Name" in 2013 and "No Good Duke Goes Unpunished" in 2014.
Mother Warriors: A Nation of Parents Healing Autism Against All Odds is the fifth book published by "New York Times" bestselling author, activist and television personality Jenny McCarthy.
 Her previous book, "Louder Than Words", reached #3 on the "New York Times" bestseller list, and has more than 200,000 hardcovers in print after 5 printings.
 Many of McCarthy's assertions within the book, such as that she cured her son's autism and the benefits of chelation are highly disputed within the medical and scientific community, as chelation therapy has been fatal in at least one instance.
 The foreword was written by her son's pediatrician, Jay Gordon.
Night Chills is a suspense novel by best-selling author Dean Koontz originally published in 1976.
This is a list of books from the "Fear Street" book series created and written by R. L. Stine.
 The first book, "The New Girl" was published in 1989.
 Various spin-off series were written, including the "Fear Street Sagas" and "Ghosts of Fear Street".
 More than 80 million "Fear Street" books have been sold as of 2003.
 The books appeared in many bestseller lists, including the "New York Times" Best Seller list for children, "USA Today" bestseller list and "Publishers Weekly" bestseller list, and the series was listed as the bestselling young-adult book series of all time.
Vision In White is the first book of the Bride Quartet series of romance novels, written by Nora Roberts.
 It spent two weeks atop the "New York Times" Bestseller List and reached number 3 on the "USA Today" bestseller list, marking the first time one of Roberts' books had become a bestseller in trade paperback format.
 A downloadable casual-play computer game based on the book was introduced by I-Play in 2010.
Dean Ray Koontz (born July 9, 1945) is an American author.
 His novels are broadly described as suspense thrillers, but also frequently incorporate elements of horror, fantasy, science fiction, mystery, and satire.
 Many of his books have appeared on "The New York Times" Bestseller List, with 14 hardcovers and 14 paperbacks reaching the number-one position.
 Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Leigh Nichols", and "Brian Coffey".
The Cove is a 2012 novel by American author Ron Rash.
 It is Rash's fifth novel, his most acclaimed novel being the "New York Times" bestseller, "Serena".
 "The Cove" was listed as #16 on the New York Times Bestseller list for Hardcover Fiction in the April 29, 2012 issue of "The New York Times Book Review" and remained on the list as #29, #22, and #31 for the three subsequent weeks.
Doug Stanton is a journalist, lecturer, screenwriter, and author of the "New York Times" bestsellers In Harm’s Way and Horse Soldiers.
 Horse Soldiers is the basis for a Jerry Bruckheimer-produced movie by the same name, starring Chris Hemsworth and Michael Shannon, to be released by Warner Bros. in 2018.
 In Harm’s Way spent more than six months on the "New York Times" bestseller list and became required reading on the U.S. Navy's reading list for officers.
 The unabridged audiobook edition of In Harm’s Way is the winner of the 2017 Audie Award in the History category.
 Horse Soldiers was featured on the front page of the Sunday "New York Times Book Review."
 His third book is called The Odyssey of Echo Company and is forthcoming in September, 2017.
Ally Condie is an author of young adult and middle grade fiction.
 Her novel "Matched" was a #1 "New York Times" and international bestseller, and spent over a year on the "New York Times" Bestseller List.
 The sequels (Crossed and Reached) are also "New York Times" bestsellers.
 "Matched" was chosen as one of YALSA's 2011 Teens' Top Ten and named as one of Publishers Weekly's Best Children's Books of 2010.
 All three books are available in 30+ languages.