In the third Isla of Adventure chapter book, Isla investigates mysterious sounds coming from the rainforest! There's a croaking, hissing, snapping creature scaring everyone in Sol's rainforest! With her best gecko friend, Fitz, and a few new animal friends, Isla sets out to figure out what's hiding deep inside! With easy-to-read language and illustrations on almost every page, the Isla of Adventure chapter books are perfect for beginning readers.