The fourth book about Cowgirl Kate and her trusty steed Cocoa furthers the adventures of the two friends, despite the gray clouds on the horizon. Kate’s chipper attitude is well-matched with Cocoa’s sensitivities. When thunder rolls in, she wants to finish the fieldwork while he wants to head for the protection of the barn. When Cocoa is too vain to don his equine rain sheet, Kate helps convince him of warmth over fashion. With their companionable ways, the western twosome show that their friendship endures whatever the weather. (Ages 5–7)