The Lemonade War is a children's novel written by American author Jacqueline Davies, published in 2007.
Jessie is excited about moving up, but Evan is irritated because his sister is good at math and is worried she might embarrass him.
The five-day war takes a disastrous turn when Jessie mixes dead fruit flies in Evan's lemonade, leading to his sales tanking.
Evan steals Jessie's earnings in revenge, but then loses the money while he attends a friend's pool party.
[2] Other reviews praised the book's humorous approach to teaching lessons about economics,[3] while noting that the plot was still driven by Jessie and Evan's sibling rivalry.