A case that's tougher to crack than an oyster shell.

The Detectives are looking for clues to clear Mr. Roper of charges that he stole the oysters.

When the local grocer is accused of stealing his oysters from private oyster beds, the Third Grade Detectives think something fishy is going on, and decide to take the case in order to help clear their grocer's good name.

The Third-Grade Detectives investigate when a fifteenth-century statue is stolen from and art museum and destroyed.

Erskine Childers' 'The Riddle of the Sands' is a classic British espionage novel set against the backdrop of rising tensions between Germany and Britain in the early 20th century. Written with meticulous attention to detail, the book offers a thrilling tale of espionage and intrigue as two men uncover a German plot to invade England. Childers' narrative style, often described as a mix of adventure and political thriller, captures the paranoia and espionage of the time period, making it a gripping read for fans of both genres. The book's historical context provides insight into the geopolitical climate of the era, making it not only entertaining but also educational for readers interested in the history of European politics. Erskine Childers, a British politician and author, drew on his own experiences sailing the North Sea to write 'The Riddle of the Sands'. His firsthand knowledge of the region and its waters lends authenticity to the novel's setting and maritime elements. His background as a former British intelligence officer also adds depth to the espionage aspects of the story, offering readers a unique perspective on the world of spies and secret missions. I highly recommend 'The Riddle of the Sands' to readers who enjoy historical fiction, spy thrillers, and maritime adventures. Childers' masterful storytelling and nuanced portrayal of the era make this novel a must-read for anyone interested in the politics and intrigue of early 20th-century Europe.

Todd uses clues from earwax and a pink handkerchief in order to discover which of his schoolmates has been in his treehouse.