In this July 8, 2015, photo, Spencer Madrie poses outside his store, Ol' Curiosities & Book Shoppe, in Monroeville, Ala. Located in the hometown of "To Kill a Mockingbird" author Harper Lee, the store has sold more than 7,000 copies of her new book "Go Set a Watchman," which is being released July 14, 2015. (AP Photo/Jay Reeves)

“We’ve sold to a bunch of different countries around the world and, of course, a ton of them in the United States,” said Madrie. “That’s exciting when you think that so many people care so much about a book release.”

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Afternoon rush hour traffic heads out of  town Wednesday, June 24, 2015, in Phoenix. An estimated 41.9 million people will travel 50 miles or more from home during the Independence Day holiday weekend, up 0.7 percent from last year and the most since 2007, according to travel agency and car lobbying group AAA. (AP Photo/Ross D. Franklin)

As usual, the vast majority of travelers will be using their cars: about 85 percent. Gas currently costs $2.78 a gallon, down 88 cents from the same time last year. That means a family driving 200 miles on highways will save about $7.30 for their holiday gas this year.

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