4The Little Books of Big Business series follows four friends in Main Town USA on their journey into business. Cat, Emma, Max & Nick each start their own business and learn key principles along the way. This series is perfect for anyone ages 5 to 105 who aspires to be an entrepreneur. Book #1 - Meet Cat Casey, the girl who turns her grandmother's brownie recipe into a business. With the help of family and friends, she learns business principles like "cost of goods sold", mass production and making a profit. Learn along with Cat as she launches her delicious Twinkle Bar business.