Washington (CNN) – Hillary Clinton's new memoir "Hard Choices" experienced a 43% drop in sales in its second week on bookshelves, according to numbers from Nielsen BookScan.
After 85,721 copies of "Hard Choices" were purchased in the book's first week, 48,227 copies of the memoir sold in the second week, according to Nielsen numbers, which make up roughly 85% of all retail book sales and were provided to CNN by a publishing source.
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These figures do not include e-books or digital downloads, but could foretell problems for "Hard Choices" to sell the first run of copies that the book's publisher, Simon & Schuster, has already ordered. The publisher told CNN last week that the book sold roughly 100,000 copies in the first week when you include digital purchases.
There is good and bad news in the numbers for Clinton and her allies.
The good news: While her first memoir, "Living History," sold 438,000 copies in its first week, it experienced a 62% drop off in the second week. So comparatively, "Hard Choices" didn't have as big a fall.
"Living History" would go on to sell 1.1 million copies, according to Nielsen.
The bad news is that Clinton critics who have been closely watching how her 656-page tome to American diplomacy and her time at state will likely be given ammunition with this first to second week drop off.
Jason Pinter, founder and publisher of Polis Books, said the decline is "not at all" surprising.
"Publicity-driven books like this are always front-loaded," Pinter said. "Which is why the first week numbers were likely a cause for concern-they were only going to go down from there."
Clinton has been on a frenetic, cross-country book tour since her memoir went on sale on June 10. She has held events in every American time zone, as well as in Canada, and has sat down for high profile interviews with all major TV networks.
But Pinter said no matter how much Clinton sells the book, the "reviews were tepid enough to squelch interest from everyone but hardcore Hillary devotees."
Simon & Schuster has maintained that they are happy with how the book has performed. Last week, Jonathan Karp, the president and publisher of Simon & Schuster, said in a statement that they were "confident we have a major bestseller."
"Simon & Schuster is thrilled with Hard Choices' strong start right out of the gate, and the terrific feedback we're hearing from reviewers, retailers, and, most importantly, readers,” Karp said. “Hard Choices is on a trajectory to being the best-selling nonfiction book of the year."
While "Hard Choices" topped the New York Times bestseller list in hardcover nonfiction for its first week, it finished fourth when you included hardcover and paperback sales. The book has also dropped out of the top 20 on Amazon's bestsellers list.
In an effort to boost international book sales, the former secretary of state will make appearances in France and Germany in July, according to Simon & Schuster.
– CNN's Brianna Keilar contributed to this report.