It’s been a big month for rediscovered books. Following record-breaking sales for Harper Lee’s Go Set a Watchman on July 14, Theodor Geisel’s What Pet Should I Get? repeated that feat at the nation’s number two chain retailer two weeks later, on July 28.

At Books-A-Million, the first original picture book written and illustrated by Dr. Seuss since 1990's Oh the Places You’ll Go set a company record for best first-day sales for a children’s picture book. “It’s no surprise that a Dr. Seuss tale has achieved a milestone like this,” said Sandra Wilson, senior buyer for children and teen books at BAM.

“Book lovers are excited about the publication of an original Dr. Seuss book," she added. "This book should become an instant classic."

Earlier in July Go Set a Watchman had the largest first-day sale of any adult fiction book at both Books-A-Million and Barnes & Noble. The latter didn't responded to a request to comment on sales of the Dr. Seuss book at press time.