
Evan and Jessie are very close as brother and sister. That is until Jessie gets to skip third grade and gets placed in Evan's fourth grade class. Evan feels like he is not the smart one, and so he decides that instead of working together on their summer lemonade stand, he is going to go solo. This hurts Jessie's feelings and she does not understand what she has done wrong to make Evan treat her so poorly. They come up with a plan to see who can make one hundred dollars the fastest. Jessie's money gets stolen, and Evan feels lousy about it. But when fourth grade starts, they know just who did it. Jessie plans a trail for the accused, and Evan and her work out their issues to solve the crime. But sometimes people's lives are not what you think.

I borrowed these from the public library
ISBN: 978-0-618-75043-6 & 978-0-547-27967-1