In The Lemonade War, by Jacqueline Davies (Sandpiper, $5.99), siblings Evan and Jessie usually get along. But when Jessie, younger by 14 months, skips third grade and winds up in Evan’s class, Evan needs a break from his little sister. The more he tries to get rid of her, the more she tries to prove that she’s not just a little kid. Misunderstandings pile up and soon the two are in an all-out battle to see who can make the most money selling lemonade during the final heat wave of the summer. The stakes are high, pride mostly, and in this war, it’s winner takes all. Evan has the people skills, the friends, and the gumption. Jessie has the math skills, the strategies, and the organization. Evan needs to not feel dumb next to his younger sister and Jessie needs to learn how to make friends and connect with people. This war might be exactly what both kids need to discover a little about business, step outside of their comfort zones, and learn not to take each other’s gifts for granted.