Lemonade. That's people-smart Evan and math braniac Jessie's specialty. It's also what helped them start a war. Jessie, Evan's sister ( who should be going to 3rd grade), is joining him in 4th grade. Imagine the humiliation of being out-smarted by your younger sister! That's terrible news for Evan, considering he's trying to hit the spotlight this year. And then it started. The war. The lemonade war. Jessie doesn't understand why Evan is so mad, but then again, understanding people is her weakest subject. When these siblings take a bet on who can reach $100 first, but from selling lemonade. Things take a turn for the wrong when things suddenly get serious. Very serious. In fact, so serious that now not only is Evan mad at Jessie, but she's also mad at him. She loves Evan, and doesn't want to stay mad at him, but to win this war, that's her only choice. Will these siblings stay at war for the rest of their mind-boggling lives, or will they unite? If not, who will win? Find out in these amazing Jacqueline Davies book!