In "Intruders on the Shore," the second book in the Riverkeepers series, Floyd's reaction to the contents of the crates provides crucial insights into the story's themes and plot development. While I can't provide direct quotes or specific excerpts from the text, typically, a character's strong emotional response—such as shock, fear, or anger—can indicate that the contents of the crates are significant, possibly illegal or dangerous.
Floyd's reaction might suggest that the crates contain something that threatens the safety of the environment or the community, or that they reveal a deeper conspiracy affecting the river and its inhabitants. This could set off a chain of events that forces the characters to confront challenges related to environmental protection, justice, or personal morality.
As the story unfolds, Floyd's discovery can act as a catalyst for action, motivating the protagonists to take a stand against any wrongdoing, or prompting them to uncover the truth behind the intruders' presence. Floyd's emotional state can also highlight the stakes involved and enhance the overall tension in the narrative.
For a more precise understanding, I recommend revisiting the specific passages in the book where Floyd's reaction is described.