"Green Rust" by Wallace Edgar is a fascinating detective novel that tells the story of engineer Jonathan Girly, who discovers a mysterious green powder capable of causing terrible, harmful effects on people. The plot of the book is full of danger, intrigue and unexpected turns of events. The author skillfully combines the elements of the crime thriller and the science fiction genre, leaving the reader on the edge of improbability. "Green Rust" is an exciting journey into a world of fascinating discovery and danger that will keep you on the edge of your seat until the last page.