The Great Lemonade Stand Stand-Off — Art Rainer

When Jake, Sophia, and Brody slide down the tube slide at their local park, they are shocked to find themselves in an underground headquarters and transformed into Secret Slide Money Club agents. Soon the friends learn that they're in an ongoing battle against Albatross, a selfish villain who uses bad money choices to turn other kids into Albies. The agents must help the Albies get free of Albatross's reach and start to make good money choices -- all while going on some ridiculous new adventures. 

In this first book in the series, the three friends must help a classmate raise money for their school. But when the Albies try to crash the agents' lemonade stand, it's time to launch some lemons while learning a lesson in giving.

The Secret Slide Money Club is a unique early-reader fiction series that uses humor and adventure to teach children the foundational principles of financial health -- Give, Save, Live. This first trio of books is quick-paced, offering tons of silliness and action while showing young readers about God's way to be wise with money. 

Also available! 
Book 2 -- The Mad Cash Dash 
Book 3 -- Trouble at the Toy Store