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Amy Schumer’s book, “The Girl With the Lower Back Tattoo” — despite being No. 1 on the best-seller list for two weeks — is a disappointment, sources say.

Although it sold 36,000 hardcover copies in its first week, Simon & Schuster paid $9 million for the funny memoir.

“The publishers are hugely disappointed. They are going to lose a ton of money,” an industry insider told me.

While critics liked the book, Internet trolls flooded Amazon with one-star reviews, which angered Schumer so much that she canceled some promotional appearances.

“How thin-skinned she is to get upset over reviews by haters who probably didn’t even read the book,” the insider said. “For $9 million, she should do whatever [the publishers] ask her.”

“Amy’s book has sold [more than] 170,000 copies across formats in the first two weeks,” a Simon & Schuster spokeswoman told me. “We are beyond thrilled.” The rep also noted that Schumer had to cancel two promotional appearances due to illness.

A source at a rival imprint said, “It’s not a disaster, but it’s not a huge success. Simon & Schuster has a long way to go to recoup their investment.”

As for the rival publishers who underbid for the book? “They are happy they lost the bidding war,” the source said. “They are breathing a sigh of relief that it isn’t theirs.”