Customers purchase novels during "Big Bad Wolf Book Sale Bangkok 2017" at the IMPACT Muang Thong Thani Exhibition and Convention Center in Bangkok, Thailand, Aug. 12, 2017. The "Big Bad Wolf Book Sale" originated in Malaysia is one of the biggest of its kind in Southeast Asia. Operating 24 hours daily from August 11 to 27, its 2017 Bangkok version will see more than three million books of over 40 categories on sale, at 60 percent to 80 percent discount rates. (Xinhua/Li Mangmang)