Registered for NYTIme API and then with the help of their API console created an URI which provide the data in JSON format to be used in the R program. Results are saved in a variable for further analysis.

library(RCurl)
## Warning: package 'RCurl' was built under R version 3.2.2
## Loading required package: bitops
## Warning: package 'bitops' was built under R version 3.2.2
library(RJSONIO)
## Warning: package 'RJSONIO' was built under R version 3.2.2
bookData=fromJSON("http://api.nytimes.com/svc/books/v3/lists/2015-01-10/hardcover-fiction.json?api-key=9729b556fd5c2d8acf029afffc15b9d2%3A1%3A73350914")
bookData_Res=bookData$results
str(bookData_Res)
## List of 8
##  $ list_name          : chr "Hardcover Fiction"
##  $ bestsellers_date   : chr "2014-12-27"
##  $ published_date     : chr "2015-01-11"
##  $ display_name       : chr "Hardcover Fiction"
##  $ normal_list_ends_at: num 16
##  $ updated            : chr "WEEKLY"
##  $ books              :List of 20
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##   .. ..$ asterisk            : num 0
##   .. ..$ dagger              : num 0
##   .. ..$ primary_isbn10      : chr "038553714X"
##   .. ..$ primary_isbn13      : chr "9780385537148"
##   .. ..$ publisher           : chr "Doubleday"
##   .. ..$ description         : chr "A downsized Wall Street lawyer joins a legal clinic in a small Virginia town."
##   .. ..$ price               : num 0
##   .. ..$ title               : chr "GRAY MOUNTAIN"
##   .. ..$ author              : chr "John Grisham"
##   .. ..$ contributor         : chr "by John Grisham"
##   .. ..$ contributor_note    : chr ""
##   .. ..$ book_image          : chr "http://du.ec2.nytimes.com.s3.amazonaws.com/prd/books/9780385537148.jpeg"
##   .. ..$ amazon_product_url  : chr "http://www.amazon.com/Gray-Mountain-Novel-John-Grisham/dp/038553714X?tag=thenewyorktim-20"
##   .. ..$ age_group           : chr ""
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##   .. .. ..$ : Named chr [1:2] "038553714X" "9780385537148"
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##   .. .. ..$ : Named chr [1:2] "0385539169" "9780385539166"
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##   .. .. ..$ : Named chr [1:2] "0385539177" "9780385539173"
##   .. .. .. ..- attr(*, "names")= chr [1:2] "isbn10" "isbn13"
##   .. .. ..$ : Named chr [1:2] "1101964871" "9781101964873"
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##   .. ..$ primary_isbn10      : chr "1476746583"
##   .. ..$ primary_isbn13      : chr "9781476746586"
##   .. ..$ publisher           : chr "Scribner"
##   .. ..$ description         : chr "The lives of a blind French girl and a gadget-obsessed German boy before and during World War II. "
##   .. ..$ price               : num 0
##   .. ..$ title               : chr "ALL THE LIGHT WE CANNOT SEE"
##   .. ..$ author              : chr "Anthony Doerr"
##   .. ..$ contributor         : chr "by Anthony Doerr"
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##   .. ..$ book_image          : chr "http://du.ec2.nytimes.com.s3.amazonaws.com/prd/books/9781476746609.jpg"
##   .. ..$ amazon_product_url  : chr "http://www.amazon.com/All-Light-We-Cannot-See-ebook/dp/B00DPM7TIG?tag=thenewyorktim-20"
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##   .. .. ..$ : Named chr [1:2] "1410470229" "9781410470225"
##   .. .. .. ..- attr(*, "names")= chr [1:2] "isbn10" "isbn13"
##   .. .. ..$ : Named chr [1:2] "1476746591" "9781476746593"
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##   .. .. ..$ : Named chr [1:2] "1501122835" "9781501122835"
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##   .. ..$ primary_isbn10      : chr "031621096X"
##   .. ..$ primary_isbn13      : chr "9780316210966"
##   .. ..$ publisher           : chr "Little, Brown"
##   .. ..$ description         : chr "Detective Alex Cross\031s family is kidnapped by a madman who wants to turn Cross into a perfect killer."
##   .. ..$ price               : num 0
##   .. ..$ title               : chr "HOPE TO DIE"
##   .. ..$ author              : chr "James Patterson"
##   .. ..$ contributor         : chr "by James Patterson"
##   .. ..$ contributor_note    : chr ""
##   .. ..$ book_image          : chr "http://du.ec2.nytimes.com.s3.amazonaws.com/prd/books/9780316210942.jpeg"
##   .. ..$ amazon_product_url  : chr "http://www.amazon.com/Hope-Alex-Cross-James-Patterson/dp/031621096X?tag=thenewyorktim-20"
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##   ..$ :List of 22
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##   .. ..$ primary_isbn10      : chr "1476770387"
##   .. ..$ primary_isbn13      : chr "9781476770383"
##   .. ..$ publisher           : chr "Scribner"
##   .. ..$ description         : chr "The continuing relationship, over five decades, between a disgraced clergyman and a drug-addicted musician."
##   .. ..$ price               : num 0
##   .. ..$ title               : chr "REVIVAL"
##   .. ..$ author              : chr "Stephen King"
##   .. ..$ contributor         : chr "by Stephen King"
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##   .. ..$ book_image          : chr "http://du.ec2.nytimes.com.s3.amazonaws.com/prd/books/9781476770406.jpeg"
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##   .. ..$ book_review_link    : chr "http://www.nytimes.com/2014/11/14/books/stephen-kings-revival.html"
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##   .. ..$ primary_isbn13      : chr "9781455521197"
##   .. ..$ publisher           : chr "Grand Central"
##   .. ..$ description         : chr "John Puller, a special agent with the Army, hunts for his brother, who was convicted of treason and has escaped from prison."
##   .. ..$ price               : num 0
##   .. ..$ title               : chr "THE ESCAPE"
##   .. ..$ author              : chr "David Baldacci"
##   .. ..$ contributor         : chr "by David Baldacci"
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##   .. ..$ publisher           : chr "Putnam"
##   .. ..$ description         : chr "A discovery of mineral deposits has changed North Korea\031s fortunes and made the country even more of a threat for President "| __truncated__
##   .. ..$ price               : num 0
##   .. ..$ title               : chr "TOM CLANCY: FULL FORCE AND EFFECT"
##   .. ..$ author              : chr "Mark Greaney"
##   .. ..$ contributor         : chr "by Mark Greaney"
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##   .. ..$ description         : chr "After searching for her mother, who has disappeared, for more than 10 years, a woman employs a psychic and a detective."
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##   .. ..$ title               : chr "LEAVING TIME"
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##   .. ..$ description         : chr "Twelve stories by a former Marine who served in Iraq; winner of the 2014 National Book Award."
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##   .. ..$ title               : chr "REDEPLOYMENT"
##   .. ..$ author              : chr "Phil Klay"
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##   .. ..$ description         : chr "The Vampire Chronicles continue after a long hiatus."
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##   .. ..$ author              : chr "Anne Rice"
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