Earlier this week, Tablet magazine’s Michael Moynihan reported that Lehrer had fabricated Bob Dylan quotes in the bestselling Imagine. It had previously been discovered that Lehrer was reusing his own material in New Yorker blog posts. Lehrer resigned from his position as a staff writer at the New Yorker. Houghton Mifflin Harcourt has stopped shipping physical copies of Imagine and the ebook is no longer for sale.

To the right is the ad that appeared this morning in Shelf Awareness, an email newsletter aimed at booksellers. (Note: The image may not appear in this post if your ad blocker is on.) Publishers Marketplace reporter Sarah Weinman pointed out the ad on Twitter.

Houghton Mifflin Harcourt had no comment on whether it is running the ads elsewhere.

Updated 8/6/12: HMH is also offering refunds to readers who purchased a print copy of the book, but notes ”consumers must submit requests to the retailer from which the e-book was originally purchased.” Here’s how to do that:

Amazon Kindle: Contact customer service if you are outside the normal 7-day window for ebook returns.

Barnes & Noble Nook: Call 1-800-The-BOOK or visit in-store customer service.

Kobo: Contact Kobo customer service.

New York Times book publishing reporter Julie Bosman first reported Lehrer’s resignation on Twitter.

Lehrer’s publisher, Houghton Mifflin Harcourt, is “exploring all options available to us,” HMH spokeswoman Lori Glazer said in a statement. “We are taking the ebook of Imagine off-sale, and halting shipment of physical copies.” (For now, though, the book is still available on Amazon.)

Houghton Mifflin also provided a statement from Lehrer:

Three weeks ago, I received an email from journalist Michael Moynihan asking about Bob Dylan quotes in my book Imagine. The quotes in question either did not exist, were unintentional misquotations, or represented improper combinations of previously existing quotes. But I told Mr. Moynihan  that they were from archival interview footage provided to me by Dylan’s representatives. This was a lie spoken in a moment of panic. When Mr. Moynihan followed up, I continued to lie, and say things I should not have said.

The lies are over now. I understand the gravity of my position. I want to apologize to everyone I have let down, especially my editors and readers. I also owe a sincere apology to Mr. Moynihan. I will do my best to correct the record and ensure that my misquotations and mistakes are fixed.

I have resigned my position as staff writer at The New Yorker.