The mysteries of nature intrigue the young boy of this book, who with the method of a detective, tracks down their solutions. Tracks, shells, nests, a brown spot of grass, all hold their secrets and the nature detective armed with a magnifying glass, keen eyes and ears, pursues them while he learns more and more of nature and her ways. A good but easy vocabulary brings this fruitful hobby to the youngest reader, encouraging him to start early in the appreciation and understanding of life around him.