Here is a clever blend of humor, math wizardry, and business know-how. As it captures the one-of-a-kind bond between brother and sister, this poignant novel also subtly explores how arguments can escalate beyond anyone's intent.

For a full hour, he poured lemonade. The world is a thirsty place, he thought as he nearly emptied his fourth pitcher of the day. And I am the Lemonade King.

Evan Treski is people-smart. He's

...

Although many things go wrong when Froggy decides to make money by setting up a lemonade stand, he still has fun with his friends.

When life gives them a problem to solve, Peg and Cat make lemonade -- and get a lesson in bartering -- in a refreshing new math adventure. It's a hot day, so what could be cooler than setting up a lemonade stand? When Peg needs some marbles to keep her special marble company, she and Cat decide to sell lemonade in exchange for ten marbles a cup. But the Teens have other ideas. "But just one cup for ten marbles?" says Mora. "I'm not made of marbles!"...