Summer may be over, but it’s still baseball season—especially for the stars of Brian Lies’s third Bats book, Bats at the Ballgame. The Houghton Mifflin picture book went on sale September 6, and has spent four weeks on the New York Times bestseller list. As he has for previous books, Lies hit the road in his brand-new “BATSmobile,” touring bookstores in Cape Cod and Maine before heading west for a September tour that took him to stores in Colorado, Arizona, and California.